Question

consider a gene with two alleles that show complete dominance. when two heterozygotes for this gene breed, they have a 25 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? 75 percent 25 percent 0 percent 50 percent

Explanation:

Step1: Recall Mendelian genetics

In a cross between two heterozygotes (Aa x Aa) for a gene with complete - dominance, the Punnett - square analysis gives the genotypic ratio 1 AA : 2 Aa : 1 aa.

Step2: Understand independent events

Each breeding event is an independent event. The outcome of one breeding does not affect the outcome of the next breeding.

Answer:

25 percent