Question

A testcross is designed to determine the genotype of a parent with the dominant tall phenotype. half of the resulting progeny came out tall, and half are short. what is the genotype of the parent?

Answer 1

A test cross is designed to determine the genotype of a parent with the dominant tall phenotype. Since, half of the resulting progeny came out tall, and half are short the genotype of parent will be Tt.

• A test cross is a genetic experiment that involves crossing a homozygous recessive organism having a dominant phenotype with an unidentified genotype (and phenotype)
• A capital letter designates a dominant allele (A versus a). The combinations that are feasible are AA, Aa, and aa since each parent contributes one allele.
• Aa people display the recessive trait, whereas offspring with either an AA or an Aa genotype will have the dominant phenotype expressed phenotypically.

Genotype of the parent an be determined by the following cross:

The parent will either be heterozygous or homozygous dominant thu, there will be two crosses

TT X tt                    and               Tt X  tt

Tt Tt Tt Tt                                   Tt Tt tt tt

(All tall)                                     (2 tall 2 dwarf)

Since, half of the resulting progeny came out tall, and half are short the genotype of parent is Tt.

learn more about test cross here: https://brainly.com/question/24173210

#SPJ4