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On the planet Seltaeb, there is a rare recessive condition known as Hofner Bassis (BB) in the Blue Meanies, a race whose genomes are identical to that of humans. Individuals with this condition can be clearly identified, as they are very musically gifted. The two alleles at this locus are B (the trait allele) and b. If both parents are known to be carriers for the recessive gene, what is the probability that they will have an affected child

Sagot :

Answer:

The probability that they will have an affected child is 25%

Explanation:

Hofner Bassis (BB) is recessive gene and is expressed in an individual who have bb genotype.

Two carrier parents will have genotype = Bb

Bb * Bb

BB, Bb, Bb, bb

The probability that they will have an affected child is 1/4 = 25%