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Lesson: Chapter 20 — Heredity

20.3. Genes and genotypes 3 of 7

Question 3

A plant with the genotype tt is:

The right answer is the one marked above.

Homozygous recessive. Both alleles are the same, so it is homozygous; both are the recessive form, so the recessive characteristic shows.

A homozygote makes only one kind of gamete, which is why tt plants always breed true.

Answer the question to continue.