Question

What ratio (dominant:recessive) will you always get when two hybrid organisms are crossed?

Answer 1

Answer: C) 3:1

Explanation: A hybrid generally is an organism of a mixed origin or an organism with a combination of two or more different traits. In genetics, a hybrid can be referred to as an organism with two different alleles for a particular trait, that is, an organism that is heterozygous for a trait.

When two hybrid organisms are crossed, the offsprings produced are one homozygous dominant, two heterozygous dominant and one homozygous recessive offsprings. Homozygous dominant and heterozygous dominant offsprings will manifest as dominant.

For example when two hybrid tall plants with Tt genotype are crossed the resulting offsprings are one TT (homozygous tall), two Tt (heterozygous tall) and one tt (recessive short) plants. One homozygous tall and two heterozygous tall plants are dominant while one short plant is recessive, thus giving the ratio of dominant to recessive as 3:1.