Question
Select the correct answer.
If both parents have brown eyes, and both have one dominant and one recessive allele, what are the odds of the parents having an offspring with
blue eyes?
None of the offspring will have blue eyes.
There is a 25% chance of an offspring having blue eyes.
There is a 50% chance of an offspring having blue eyes.
All of the offspring will have blue eyes.
Submit
Type here to search
- 20 A 40
PM

There is a 25% chance of an offspring having blue eyes.

Explanation:

A punnet square can be described as a diagram which is made to check the outcomes of a cross.

In the scenario discussed in the question, only one trait is being studied. Such a cross is termed as a monohybrid cross.

As both the parents are heterozygous for the trait, hence the punnet square can be made as follows:

       B             b

B   BB            Bb

b   Bb            bb

The results of this punnet square show that:

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.