Question

the punnett square below shows the p generation of a cross between two parents. both parents have a widows peak. a a a aa aa a aa aa choose a word from the drop - down for each blank to complete the sentences below. the punnett square above shows a cross between. once the cross is completed, of the offspring will not have a widows peak, while of the offspring will have a widows peak. the genotypic ratio for the f1 generation will be.

Explanation:

The Punnett - square shows a cross between two heterozygous parents (Aa). The allele for widow's peak (A) is dominant over the allele for no widow's peak (a). Offspring with genotypes AA and Aa will have a widow's peak, while those with aa will not. The genotypes and their ratios are determined by counting the number of each type in the Punnett - square.

Answer:

The Punnett square above shows a cross between heterozygous parents. Once the cross is completed, 25% of the offspring will not have a widow's peak, while 75% of the offspring will have a widow's peak. The genotypic ratio for the F1 generation will be 1:2:1 (AA:Aa:aa).