Question

If tall (T) is dominant over dwarf (t) and round seeds (R) is dominant over wrinkled seeds (r), the genotype of a true breeding tall plant with wrinkled seeds would be ______.

Options

• TtRr

• TTRR

• TTrr

• TTRr

Answer 1

If tall (T) is dominant over dwarf (t) and round seeds (R) is dominant over wrinkled seeds (r), the genotype of a true breeding tall plant with wrinkled seeds would be TTrr.

Explanation:

A true-breeding tall plant must be homozygous TT. Wrinkled seeds are recessive, so the plant must be rr; together the genotype is TTrr.