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Consider a gene with two alleles that show complete dominance. When a homozygous recessive individual (qq) is crossed with a heterozygous individual (Qq), they have a 50 percent chance of producing a homozygous recessive offspring. The next time these two individuals breed, what are the chances that they will once again have a homozygous recessive progeny?

Respuesta :

Answer:

There will be [tex]50[/tex]% chances of occurrence of a  homozygous recessive progeny

Explanation:

Complete dominance is a situation in which the trait which is considered as dominant overshadow the trait represented by recessive allele.

Hence Q will always over dominate q

Thus, when next time a cross is carried out between homozygous recessive individual (qq) and heterozygous individual (Qq), the following offspring will be produced-

q q

Q Qq Qq

q qq qq

Thus, as we can see out of four offspring , two have homozygous recessive progeny i.e qq

Hence, the chances of occurence of a  homozygous recessive progeny again is equal to

[tex]\frac{2}{4} * 100\\= 50[/tex]%

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