In a tetraploid species,an individual with genotype B/b/b/b was crossed with an individual with genotype b/b/b/b.What is the expected genotypic ratio in the offspring?
A)1:1
B)1:2
C)1:4
D)1:8
E)1:16

Question

Quizplus · Accepted Answer

In a tetraploid species, each individual has four copies of each chromosome. When an individual with genotype B/b/b/b (one dominant allele and three recessive alleles) is crossed with an individual with genotype b/b/b/b (all recessive alleles), the offspring can either inherit the dominant allele B (resulting in a B/b/b/b genotype) or not (resulting in a b/b/b/b genotype). This results in a simple 1:1 genotypic ratio of B/b/b/b to b/b/b/b in the offspring.

In a Tetraploid Species,an Individual with Genotype B/b/b/b Was Crossed