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blsea [12.9K]
3 years ago
6

Which factors can prevent permanent fixation of an allele (i.e. maintain genetic diversity)? Hint: You're going to have to try d

ifferent values than just those presented in the exercise--try to keep both alleles present!(A) Genetic Drift(B) Natural Selection(C) Mutation(D) Gene Flow
Biology
1 answer:
Katyanochek1 [597]3 years ago
4 0

Answer:

The answer is Genetic drift and natural selection.

Explanation:

Genetic drift is a change is genetic composition that enhances organisms adaptation to an environment. The continuous change gives an extra advantage and enhances better chances of survival

Natural selection is the process that results in the adaptation of an organism to its environment by relatively reproducing its genes.

This two factors are the major factors that like causes allele fixation

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Which environmental factor could lead to a decrease in genetic variation in a population of tuna?
jeyben [28]

Answer:

The environmental factor that could lead to a decrease in genetic variation in a tuna population is an increase in pollution (second option).

Explanation:

There is a correlation between genetic variability and environmental pollution, the latter being a factor that impacts negatively on the variability of a specific population.

The concept of pollution stress not only implies a low rate of reproduction, but it is also a factor that prevents genetic exchange with other populations, which is a factor that makes the genetic variability decrease in a population.

For these reasons an increase in pollution implies a decrease in genetic variability in a tuna population.

  • <em>Other options, such as </em><u><em>an increase in food availability</em></u><em>, a</em><u><em> decrease in tuna fishing </em></u><em> or </em><u><em>a decrease in tuna predators</em></u><em>, are environmental factors that contribute to increased genetic variability.</em>

3 0
3 years ago
Read 2 more answers
PLEASE HELP ME I DON’T UNDERSTAND !
nlexa [21]

Answer:no

Explanation:

5 0
3 years ago
What type of sound is particularly effective for many marine mammals because it allows sound to travel for very long distances i
kifflom [539]
They produce narrow-band high-frequency sound to help them navigate in water. These high-frequency sounds are used in echolocation.  Echolocation is used to identify and locate prey and also avoid the predators. Marine mammals like whales and dolphin use echolocation in different manners.
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3 years ago
Functional Magnetic Resonance Imaging is a tool that has been very useful in identifying what parts of the brain do what. Scient
Ne4ueva [31]

Answer:

E. It takes a picture of the brain according to oxygen levels. More oxygen in an area indicates more activity in that area.

Explanation:

Haemoglobin is diamagnetic when oxygenated but paramagnetic when deoxygenated. This distinction in magnetic characteristics leads to tiny variations in the blood MR signal. Since blood oxygenation differs, these variations can be used to identify brain activity depending on the concentrations of neural activity.

4 0
3 years ago
Help please! DNA Assignment
vovangra [49]

Answer:

DNA Replication:

Replicate the following strand of DNA:

Original DNA: A T G A A C CA T T C A G T A T G G

Complementary DNA:

Remember that the complimentary base pairs in DNA are Adenine-Thymine and Guanine-Cytosine, or A-T and G-C. This means that if the original sequence is:

A T G A A C C A T T C A G T A T G G

Then the compliment is (replace with the opposite base pairs):

T A C T T G G T A A G T C A T A C C

Transcription:

Transcribe the DNA to make an mRNA molecule

COMPLIMENTARY DNA:

mRNA Molecule:

So if our complimentary DNA (antisense stand) is T A C T T G G T A A G T C A T A C C then to transcribe, we basically create another complimentary strand, but for mRNA, we use Uracil instead of Thymine:

A U G A A C C A U U C A G U A U G G  

Translation:

Translate the mRNA into the corresponding amino acids.

mRNA MOLECULE:

AMINO ACID:

Using the DNA sequence provided, determine the amino acids.

Next, take each codon (3-base set) to the table and record the corresponding protein:

A U G = Methionine (start)

A A C = Asparagine

C A U = Histidine

U C A = Serine

G U A = Valine

U G G = Tryptophan

ORIGINAL DNA: A T G G G T C T A G C G A A A G A T

Complementary DNA:

mRNA DNA Molecule:

Amino Acid:

And we do it all again:

A T G G G T C T A G C G A A A G A T = original DNA

T A C C C A G A T C G C T T T C T A = complementry DNA

A U G G G U C U A G C G A A A G A U = mRNA

A U G = Methionine (start)

G G U = Glysine

C U A = Leucine

G C G = Alanine

A A A = Lysine

G A U = Aspartate

Explanation:

4 0
3 years ago
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