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3 years ago

Will mark Branliest if correct. (I think B, but I am not sure. It doesn't seem to be D.)

Biology

1 answer:

zheka24 [161]3 years ago

5 0

Answer:

Mitochondrial DNA is useful as a molecular clock because it displays uniparental inheritance

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2.Which of the following represents a genetic cross between 2 individuals that are each heterozygous for both traits?

wariber [46]

Answer:

A. AaBb x AaBb

Explanation:

The term heterozygous refers to the presence of two different alleles of same gene in an organism. The one allele can be of wild type (original type) and one can be mutated or newly formed.

In the question, two traits are represented by two letters, A and B and alleles as A and a and B and b, respectively. We are asked about a cross involving two traits and two individuals in such a way that both are heterozygous.

If we look at option A, AaBb x AaBb,

we see that one trait A and the other trait B is in heterozygous form (Aa and Bb) in both individuals.

If we look at option B. AABB x AABB

we see that one trait A and the other trait B is in homozygous form form (AA and BB) in both individuals. Homozygous means when the alleles are same for each trait in an individual.

If we look at option C,Aa x Bb

There are not two traits, one trait of one individual and other trait of other individual is being crossed that is not possible.

If we look at option D. AAaa x BBbb

Again, the individuals are homozygous for two traits.

Therefore, A is best option.

Hope it helps!

7 0

3 years ago

Linda, who is pregnant, and fred, her husband, visit her doctor. upon examination, the doctor concludes that the baby's spinal c

Trava [24]

The baby is in its 4-5 month

7 0

4 years ago

Hershey and Chase used radioactive isotopes to label different parts of the phage. They grew one batch of phage in the presence

AlekseyPX

The sulphur would lable the capsule and the phosphorous the nucleic acid.

<h3><u>Explanation</u>:</h3>

Hershey and Chase experiment included growing of the pages in two batches, one in presence of 35S and other in presence of 32P. They then infected bacterial cells with these phages, cleaned them and then centrifuge the cells to isolate the marked elements in bacterial cells.

This was done to isolate which part of the phage is actually infective. Sulphur being a part of the proteins will mark the capsule whereas DNA having the phosphate bridges will be marked by 32P.

5 0

3 years ago

Which of the following terms describes the movement of water from the surface to the atmosphere?

lukranit [14]

Answer:

The answer is evaporation.

Explanation:

Runoff is not right because runoff is water that hits the surface of the earth, then runs down into natural bodies of water. It is not condensation either. That is because condensation is when cool water vapor comes into contact with humid, warm air causes water droplets to appear on the surface of what is containing the cool water vapor. Finally, precipitation is when water comes down from the atmosphere to the surface of the earth, therefore this is incorrect. Evaporation however is when water from the surface of the earth turns into water vapor and goes into the atmosphere. Therefore it is the right answer.

8 0

3 years ago

If you have the genotype Ww, where W represents purple flowers and w represents white flowers, which one is the dominant trait?

Shtirlitz [24]

If you have the genotype Ww, where W represents purple flowers and w represents white flowers, which one is the dominant trait?

Answer:

I think purple flowers.

7 0

3 years ago