Question

A trait in cows is determined by two alleles of a single gene.allele R is dominant,and allele r is recessive. What is the probability of the dominant trait being expressed in the offspring of one RR Parent and one rr parent?

Answer 1

The probably is 0.75 or (3/4) depending on how you want to report it.

Answer 2

Answer : The probability of the dominant trait being expressed in the offspring is 100%.

According to Mendel's law of dominance the dominant allele determines the phenotype of offspring in First filial generation (F1). when dominant homozygous RR parent is crossed with recessive homozygous rr parent, as a result a all offspring (100%) have dominant allele R heterozygous hybrid (Rr).