Heredity & Punnett Squares

An organisms visible traits is called a :

Why do scientists use Punnett Squares?

The gene combination of an organism is called a:

Mary has brown hair and Cameron has red hair. Mary's genotype is represented in a Punnett Square using BB and Cameron's genotype is represented with bb. Who's genotype is homozygous?

Which of the following represents a heterozygous genotype?

Which of the following represents a homozygous genotype?

Justin and Kim are planning to start a family. Justin has brown eyes (B) and is heterozygous and Kim has blue eyes (b) and is homozygous recessive. What percent of their offspring could have blue eyes? (Below are the results of the Punnett Square)

Bb bb

Bb bb

Black hair (B) is dominant over blonde hair

(b). Jerry has blonde hair and has a homozygous genotype and Rebecca has Black hair and has a heterozygous genotype. What are the possible phenotypes of their offspring?

Curly hair (s) is a recessive trait and straight hair (S) is a dominant trait. If person is homozygous recessive, what type of hair do they have?

Freckles (F) is a dominant trait and to no freckles (f). If person is has feckles, what possible genotypes could they have?