Which type of mutation results in an extra copy of all or part of a chromosome?

QUESTION POSTED AT 18/01/2020 - 05:58 AM

Answered by admin AT 18/01/2020 - 05:58 AM

Answer:

Duplication

Explanation:

Mutations can be defined as changes that occur in the genetic material (DNA) of living organisms. These changes are an important source of genetic variability and are often responsible for the emergence of new species.

Mutations are classified into a few different types. In the case of the above question, the mutation is termed as "duplication".

In duplication, there is the formation of an additional segment in one of the chromosomes. In general, the consequences of duplication are well tolerated as there is no shortage of genetic material.

Post your answer

Related questions

What are some examples of how mutation aides genetic variation?

Why study human genetics? One reason is simply an interest in better understanding ourselves. As a branch of genetics, human genetics concerns itself with what most of us consider to be the most interesting species on earth: Homo sapiens. But our interest in human genetics does not stop at the boundaries of the species, for what we learn about human genetic variation and its sources and transmission inevitably contributes to our understanding of genetics in general, just as the study of variation in other species informs our understanding of our own.

A second reason for studying human genetics is its practical value for human welfare. In this sense, human genetics is more an applied science than a fundamental science. One benefit of studying human genetic variation is the discovery and description of the genetic contribution to many human diseases. This is an increasingly powerful motivation in light of our growing understanding of the contribution that genes make to the development of diseases such as cancer, heart disease, and diabetes. In fact, society has been willing in the past and continues to be willing to pay significant amounts of money for research in this area, primarily because of its perception that such study has enormous potential to improve human health. This perception, and its realization in the discoveries of the past 20 years, have led to a marked increase in the number of people and organizations involved in human genetics.

This second reason for studying human genetics is related to the first. The desire to develop medical practices that can alleviate the suffering associated with human disease has provided strong support to basic research. Many basic biological phenomena have been discovered and described during the course of investigations into particular disease conditions. A classic example is the knowledge about human sex chromosomes that was gained through the study of patients with sex chromosome abnormalities. A more current example is our rapidly increasing understanding of the mechanisms that regulate cell growth and reproduction, understanding that we have gained primarily through a study of genes that, when mutated, increase the risk of cancer.

Likewise, the results of basic research inform and stimulate research into human disease. For example, the development of recombinant DNA techniques (Figure 3) rapidly transformed the study of human genetics, ultimately allowing scientists to study the detailed structure and functions of individual human genes, as well as to manipulate these genes in a variety of previously unimaginable ways.


ANSWERED AT 24/02/2020 - 12:35 AM


QUESTION POSTED AT 24/02/2020 - 12:35 AM

In pea plants, yellow (Y) seed color is a dominant trait, and green seed color (y) is a recessive trait. Which resulting plant with yellow seeds could produce a plant with green seeds in the next generation? A. YY B. Yy C. yy D. Yg

Answer: The correct answer is-

B. Yy

As per the information in the question,  yellow (depicted by Y allele) seed color is a dominant trait whereas green seed color is a recessive trait ( depicted by y allele).

A dominant trait always masks the expression of a recessive trait.

Presence of single dominant allele ( such as in Yy, which shows heterozygous dominant genotype) in the genotype can produce a dominant trait whereas recessive trait is only expressed when its genotype is homozygous recessive (such as yy that is both alleles should be recessive allele) .

A plant with genotype Yy will form two gametes that is Y and y.

When such plants are allowed to interbreed, there is a probability of 25% of producing green seeds in the next generation.

Refer punett square.

ANSWERED AT 24/02/2020 - 12:32 AM


QUESTION POSTED AT 24/02/2020 - 12:32 AM

Letter D is the part of the cell that makes proteins. What is letter D? A) ribosomes B) chromosomes C) chloroplast

the answer is A.RIBOSOMES

ANSWERED AT 24/02/2020 - 12:27 AM


QUESTION POSTED AT 24/02/2020 - 12:27 AM

Describe several types of agal colonies

Although the term algae originally referred to aquatic plants, it is now broadly used to include a number of different groups of unrelated organisms. There are seven divisions of organisms that make up the algae. They are grouped according to the types of pigments they use for photosynthesis, the makeup of their cell walls, the types of carbohydrate compounds they store for energy, and the types of flagella (whiplike structures) they use for movement. The colors of the algae types are due to their particular mixtures of photosynthetic pigments, which typically include a combination of one or more of the green-colored chlorophylls as their primary pigments.

HOPE this helps!!!!!!

ANSWERED AT 24/02/2020 - 12:26 AM


QUESTION POSTED AT 24/02/2020 - 12:26 AM

A microbiologist is in the process of classifying a newly discovered organism. Its characteristics include: · eukaryotic · multicellular · reproduces by spores · motile in some stage of its life cycle · decomposer Which type of organism is it most likely to be? club fungus fungus-like protist plant-like protist sac fungus

Based on the characteristics of the new organism discovered by the biologist, it can be concluded that this organism is most likely a fungus-like protist. The organism is a multi-cellular eukaryote who reproduced by the spores and is motile in few stages of the life cycle. Besides all this it is a decomposer. This all characteristics fit the description of a fungus like protist. They are most commonly found on the dead wood, but they also produce spores like the fungi.

Hence, the correct answer is 'fungus-like protist'.

ANSWERED AT 24/02/2020 - 12:18 AM


QUESTION POSTED AT 24/02/2020 - 12:18 AM

Which stage does the following occur chromatin condenses into chromosomes

In prophase the chromatin condenses into chromosomes. 

ANSWERED AT 24/02/2020 - 12:12 AM


QUESTION POSTED AT 24/02/2020 - 12:12 AM

Chromosome is to DNA as hour is to what?

Chromosome is to DNA as hour is to minute.

ANSWERED AT 24/02/2020 - 12:07 AM


QUESTION POSTED AT 24/02/2020 - 12:07 AM

Which could be classified as part of an ecosystem but not part of a community trees,grasses,bacteria,minerals

The correct answer is minerals.

Minerals can be considered as the abiotic factor present in the ecosystem but it cannot be considered as a part of community.

Ecosystem can be defined as the interaction of the biotic (living things) and abiotic factor(non-living things) in which the plants, animals and human beings survive with each other.

Community can be defined as the group of organisms interacting among each other.

Minerals can be a part of ecosystem but not a part of community.

ANSWERED AT 23/02/2020 - 11:57 PM


QUESTION POSTED AT 23/02/2020 - 11:57 PM

Most streams result from what

Answer:

A stream refers to a water body with the surface water flowing within the banks and bed of a channel. The stream generally results due to the majority of the water coming from snow and rain. The majority of this water gets entered into the atmosphere again by the process of evaporation from water bodies and soil, or by plant’s evapotranspiration. Some of the water continues to sink into the Earth by infiltration and turns into groundwater, the majority of which ultimately goes into the streams.

ANSWERED AT 23/02/2020 - 11:56 PM


QUESTION POSTED AT 23/02/2020 - 11:56 PM

What type of information is being presented by a scientist who has a reason for presenting information a certain way?

You cant answer this without looking at the diagram. sorry.

ANSWERED AT 23/02/2020 - 11:30 PM


QUESTION POSTED AT 23/02/2020 - 11:30 PM

Mario at lab table A needs a pair of forceps (tweezers). Max at lab table B tosses Mario a pair. In terms of laboratory safety, which best describes Max’s behavior? a. It demonstrates a lack of planning. b.It is unsafe and can result in someone getting hurt c.It is safe and appropriate d.It shows proper handling of equipment

Answer: Option (b) is the correct answer.

Explanation:

When Max tossed a pair of forceps (tweezers) from his table towards Mario's table then it is possible that forceps might hit someone and that person will get hurt.

Hence, it is not a proper way or method to handle equipment in the laboratory.

Thus, we can conclude that in terms of laboratory safety, it is unsafe and can result in someone getting hurt.

ANSWERED AT 23/02/2020 - 11:14 PM


QUESTION POSTED AT 23/02/2020 - 11:14 PM

Which major change can occur in a small population that is the result of the genetic drift? A. recessive traits always become dominant B. new individuals add their genes to the gene pool C. large changes in allele frequencies can occur in a short time.

The answer is C. large changes in allele frequencies can occur in a short time.

Genetic drift is a change in the frequency of alleles in a population as a result of random sampling of organisms and it decreases genetic variation of the population. In specific circumstances, large and rapid changes in allele frequencies can occur in a short time. The smaller the population, the more susceptible it is to genetic drift.

ANSWERED AT 23/02/2020 - 11:09 PM


QUESTION POSTED AT 23/02/2020 - 11:09 PM

Which of the following statements about homologous chromosomes is likely to be true?

They contain the same genes 
they do Connect to each other to form homologous pairs
 they divide into  meiosis too

ANSWERED AT 23/02/2020 - 11:07 PM


QUESTION POSTED AT 23/02/2020 - 11:07 PM

Which of the following are contained within the nucleus? mitochondria plasmids nucleoids chromosomes

Nucleoids and chromosomes

ANSWERED AT 23/02/2020 - 10:59 PM


QUESTION POSTED AT 23/02/2020 - 10:59 PM

Opinions are an important part of scientific data collection and analysis. True or False

False because in a scientific data collection the key word is data, not personal knowledge, you would need to gather actual research

Hope this helps

ANSWERED AT 23/02/2020 - 05:06 AM


QUESTION POSTED AT 23/02/2020 - 05:06 AM

Part A - The glucose-sodium cotransporter

the glucose-sodium cotransporter in animals, Na+ moves back into the cell down its electrochemical gradient, providing the energy for glucose to move into the cell against its concentration gradient.  
It makes sense css  glucose is cotransported with Na+ ions
In cotransport, the energy required to move one solute against its concentration or electrochemical gradient is provided by an ion moving into the cell down its electrochemical gradient. 

ANSWERED AT 23/02/2020 - 03:20 AM


QUESTION POSTED AT 23/02/2020 - 03:20 AM

Which beatbox describes the relationship between dna, genes, and chromosomes?

Chromosomes are made from DNA. Genes are short sections of DNA. Genetically identical cells are produced by a type of cell division called mitosis. In sexual reproduction, a male gamete fuses with a female gamete to produce a new cell. This is called fertilisation. Gametes are produced by a type of cell division called meiosis. They contain a single set of chromosomes, whereas body cells contain two sets of chromosomes.


ANSWERED AT 23/02/2020 - 03:00 AM


QUESTION POSTED AT 23/02/2020 - 03:00 AM

How many chromosomes does each cell have?

In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females

ANSWERED AT 23/02/2020 - 02:57 AM


QUESTION POSTED AT 23/02/2020 - 02:57 AM

What type of rna carries a code from the nucleus to the site of protein synthesis

MRNA, short for  messenger RNA

ANSWERED AT 23/02/2020 - 02:37 AM


QUESTION POSTED AT 23/02/2020 - 02:37 AM

The ability to roll your tongue is determined by a dominant gene (R) while recessive gene results in the inability to roll the tongue (r). A man and his wife can both roll their tongues and are surprised to find that thier son cannot. Explain this by showing the genotypes of all three persons

The genotypes of the parents would both be Aa or heterogeneous. Therefore, based on a punnet square, there is a 25% chance that the offspring would have the genotype aa or homogeneous recessive, which occurred. 

ANSWERED AT 23/02/2020 - 02:34 AM


QUESTION POSTED AT 23/02/2020 - 02:34 AM

What is meant by homologous chromosomes? chromosomes are found in pairs the gene's alleles are found in matched chromosome pairs all chromosomes contain the same genes each homologous chromosome has identical genotypes

Answer:

Chromosomes are found in pairs

Explanation:

Homologous chromosomes are chromosome pairs similar in lenght, gene positioning and centromere location but non-identical. They are donated by each parent (make and female). They are non-identical in the sense that the alleles on each pair may be different. For example, the chromosome donated by a female pea plant may contain a yellow allele for a particular gene while that donated by the male pea plant may contain a green allele.

A karyotype (a pictorial display of chromosomal arrangement) shows that in a diploid organism like humans, chromosomes are in two complete sets. Each human cell contains 23 pairs of chromosomes in which every chromosome pair represents a set of homologous chromosomes.

In each pair of chromosome, one chromosome is contributed by the male parent while the other by the female parent. In total, each parent contributes 23 chromosomes via gametes to form a total of 23pairs or 46chromosomes.

ANSWERED AT 23/02/2020 - 02:03 AM


QUESTION POSTED AT 23/02/2020 - 02:03 AM

What type of fuel makes up biodiesel

Biodiesel is defined as mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats which conform to ASTM D6751 specifications for use in diesel engines. Biodiesel refers to the pure fuel before blending with diesel fuel.

i hope this helps you in the time of your need!! =D

ANSWERED AT 23/02/2020 - 01:43 AM


QUESTION POSTED AT 23/02/2020 - 01:43 AM

Hat type of DNA is easiest to collect? a. Nuclear DNA b. Mitochondrial DNA c. Cellular DNA d. Individualistic DNA

A.Nuclear DNA I think I hope this help

ANSWERED AT 22/02/2020 - 07:00 PM


QUESTION POSTED AT 22/02/2020 - 07:00 PM