Question

a gardener received a pea plant from her neighbor, and she wants to know its genotype. the neighbor told her it produces round peas, which is a dominant trait (r) to wrinkled peas (r). the gardener performs a test cross and observes that half of the offspring plants produce wrinkled peas. what is the genotype of the plant she received from her neighbor?

Answer 1

Homozygous dominant RR is the genotype of the plant she received from her neighbor

What is Homozygous dominant and recessive ?

A dominant allele must be present in at least one copy for a trait to be considered dominant. Two copies of a recessive allele result in a phenotype known as a recessive trait. Blood type O is a recessive characteristic in humans, whereas blood type A is a dominant feature. This indicates that only one A allele is required for the expression of blood type A. Two O alleles are required for the expression of blood type O.

• A test cross is a union of a homozygous recessive person with a known genotype. Gregor Johann Mendel was the first to employ test cross research. It is used to determine if a dominant trait is homozygous or heterozygous.

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