A heterozygous pea plant with violet flowers was crossed with homozygous pea plant with white flower. Violet is dominant over white. Which one of the following represents the expected combinations among 40 progenies formed ?

Given:
The heterozygous pea plant with violet flowers has the genotype Vv and it is crossed with the homozygous pea plant with white flowers which has the genotype vv.
From the cross, we can see that there are two possible genotypes among the progeny:

Vv: Heterozygous violet (violet flower) 

vv: Homozygous white (white flower) 

The expected combinations among the 40 progeny can be estimated based on the ratios of the genotypes. Since all progeny will receive one allele from each parent, we can expect that:

50% (2/4) of the progeny will have the genotype vv (homozygous white). 

50% (2/4) of the progeny will have the genotype Vv (heterozygous violet). 

Given that we have 40 progeny, we can calculate the expected numbers:

Number of progeny with genotype VV: 40 × 2/4 = 20 

Number of progeny with genotype Vv: 40 × 2/4 = 20