Answer: 50%
Explanation:
Let represent the dominant allele by ''R'' and the recessive allele by ''r'' in Gene 87.
The first parents has one dominant and one recessive allele for gene 87 denoted by ''Rr''
And the second had two recessive allele for gene 87 denoted by ''rr''
When both parents mate the possible genotype for gene 87 for their child is
Rr rr Rr rr
This means that the chances that a child will inherit two recessive allele (rr) for gene 87 is 2/4. In percentage 2/4 * 100 = 50%
While the chances that a child will inherit one dominant and one recessive allele is also 2/4. In percentage 2/4 * 100 = 50%
One parent has one copy of a dominant allele for gene 87 and one recessive allele for Gene 87.
The other parent has two copies of the recessive allele for Gene 87.
The chance that their children will inherit the recessive condition rr is 50%
let these alleles be represented by R as dominant and r as recessive
parent 1 Â Â Â Â Â Â R Â Â Â Â r
parent 2   r   Rr     rr
         r   Rr     rr
Percentage of Rr is 50% while the percentage of rr is 50% in a ratio of 1:1.
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