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tatuchka [14]
3 years ago
7

During DNA replication, two extra guanine bases are added to the DNA. What type of mutation is this? A. Nondisjunction mutation

B. Silent mutation C. Point mutation D. Frameshift mutation
Biology
1 answer:
MissTica3 years ago
5 0

Answer:

A mutation, which may arise during replication and/or recombination, is a permanent change in the nucleotide sequence of DNA. Damaged DNA can be mutated either by substitution, deletion or insertion of base pairs. Mutations, for the most part, are harmless except when they lead to cell death or tumor formation. Because of the lethal potential of DNA mutations cells have evolved mechanisms for repairing damaged DNA.

Types of Mutations

There are three types of DNA Mutations: base substitutions, deletions and insertions.

1. Base Substitutions

Single base substitutions are called point mutations, recall the point mutation Glu -----> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.

Transition: this occurs when a purine is substituted with another purine or when a pyrimidine is substituted with another pyrimidine.

Transversion: when a purine is substituted for a pyrimidine or a pyrimidine replaces a purine.

Explanation:

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You are working with a 125 million bp human chromosome (1 centimorgan = 1 million bp), and wish to use markers to map newgenes v
Lena [83]

Answer:

After every 0.192 centimorgan

Explanation:

If there are 125 million base pairs then according to the parallel ratio compare rule it should contain an average of 650 genes. If every gene has to be marked by a single marker on each end then a total number of 651 markers are used after every 0.192 centimorgan distance.

4 0
3 years ago
Primary spermatocytes are diploid (2n) cells with all of the organelles typically found in eukaryotic animal cells. Spermatogene
Aneli [31]

Answer: a. Genetic recombination (crossing over)

b. Can also be explained in terms of crossing over

c. Non disjunction of homologous chromosomes in meiosis 1

Explanation:

The process that allows for the transfer of both the paternal and maternal materials to is the crossing over process that takes at meiosis 1 changing them to secondary spermatocytes. While they are still primary spermatocytes, they are still diploid cells having both the maternal and paternal chromosomes. But since the spermatozoon is an haploid cell, it is able to retail some of both parents chromosome by the crossing over event which takes place between homologous paternal and maternal chromosomes allowing them to exchange materials. Thus the chromosomal contents of the primary spermatocyte differs from that of the spermatozoon.

C. This can occur as a result of the one of the homologous chromosome pair refusing to separate at meiosis 1 with one gamete containing 4 chromosomes/8 sister chromatids and the second having 2 chromosomes/4 sister chromatids.

3 0
3 years ago
Oils produced by your skin fall under which category of macromolecules?
Zinaida [17]
They are liquid lipids..
(d)
4 0
3 years ago
Does democracy play a role in population growth rate​
NeTakaya

Answer:

Democracy does play a role in population growth rate. Depending on who we vote as President and what law he/or soon to be she can pass one day abortions might stop as a whole, causing the growth rate to go up. For example, in South Korea, the President passed a law that abortions are no longer allowed. People now can not kill the not yet born child in here stomach under no circumstances. This will cause the growth rate to go up in South Korea.

8 0
2 years ago
Write a short note on photosynthesis
levacccp [35]

Photosynthesis is the process by which plants and other things make food. It is a chemical process that uses sunlight to turn carbon dioxide into sugars that the cell can use as energy. As well as plants, many kinds of algae, protists, and bacteria use it to get food.

Hope this helps (:

5 0
3 years ago
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