In a newly-discovered, sexually-reproducing species, the allele for purple eyes (Y)(Y) is dominant to that produces yellow eyes (y)(y).A heterozygous purple-eyed organism mates with a homozygous recessive yellow-eyed organism. What are the chances that their first child will have purple eyes?Elimination ToolSelect one answerA0%0%B25%25%C50%50%D75%
Question
In a newly-discovered, sexually-reproducing species, the allele for purple eyes (Y)(Y) is dominant to that produces yellow eyes (y)(y).A heterozygous purple-eyed organism mates with a homozygous recessive yellow-eyed organism. What are the chances that their first child will have purple eyes?Elimination ToolSelect one answerA0%0%B25%25%C50%50%D75%
Solution
To solve this problem, we need to understand the basics of genetics.
The purple-eyed organism is heterozygous, which means it has two different alleles for the eye color gene: one for purple eyes (Y) and one for yellow eyes (y). We can represent this as (Yy).
The yellow-eyed organism is homozygous recessive, which means it has two identical alleles for the yellow eye color gene (yy).
When these two organisms mate, they each contribute one allele to their offspring. The possible combinations are as follows:
- The offspring gets the Y allele from the purple-eyed parent and the y allele from the yellow-eyed parent, resulting in a heterozygous purple-eyed offspring (Yy).
- The offspring gets the y allele from both parents, resulting in a homozygous recessive yellow-eyed offspring (yy).
So, the chances of their first child having purple eyes (Yy) is 50%. Therefore, the correct answer is C50%.
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