If blue feathers (F) are dominant over red feathers (f), which of the following combinations will produce only offspring with red feathers?

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Quizplus · Accepted Answer

A monohybrid cross is a genetic mix between two individuals who have homozygous genotypes, which means the genotype has two of the same alleles (either both dominant or both recessive). This results in opposite phenotypes for a certain genetic trait. In order to have all offspring with only the recessive traits, then both parents should have only recessive gene alleles so that all allele combinations would result in both recessive alleles present.
 11ec0fb7_2807_e32b_95f0_bf1a8ac85500_NR0002_00 If the parents have a genotype of Ff and Ff, then the offspring will have a 3:1 ratio of dominant:recessive phenotype and the resulting genotypes will be (FF, 2 Ff and ff).
If the parents have a genotype of FF and ff, then the offspring will have a 4:0 ratio of dominant:recessive phenotype and all the resulting genotypes will be Ff.
If the parents have a genotype of Ff and ff, then the offspring will have a 1:1 ratio of dominant:recessive phenotype and the resulting genotypes will be (2 Ff and 2 ff).

If Blue Feathers (F) Are Dominant Over Red Feathers (F)