Punnett Square Practice

Front

B = brown eyes
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.

Back

they have same phenotype but different genotypes

Front

What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness? Options: 0 in 4, 1 in 4, 2 in 4, 4 in 4

Back

0 in 4

Front

Genotype of this cross? Options: 1 Yy: 2 yy: 0 YY, 2 Yy: 2 yy: 0 YY, 3 Yy: 1 yy: 0 YY, 1 Yy: 3 yy: 0 YY

Back

2 Yy: 2 yy: 0 YY

Front

What is the phenotype of the offspring? (A-Brown hair; a-blond hair) Options: 50% Brown Hair and 50% Blond Hair, 25% Brown Hair and 75% Blond Hair, 75% Brown Hair and 25% Blond Hair, 0% Brown Hair and 100% Blond Hair

Back

75% Brown Hair and 25% Blond Hair

Front

Genotype of offspring when a tall plant (TT) is crossed with a tall plant (Tt).

Back

2 TT: 2 Tt: 0 tt

Front

A green pea plant (GG) is being crossed with a green pea plant (Gg). What is the phenotype?

Back

100% green

Front

A red flower (Rr) is crossed with a white flower (rr). What is the genotype?

Back

0 RR; 2 Rr: 2 rr

Front

What is the probability of heterozygous offspring? Options: 25%, 50%, 0%, 100%

Back

50%

Front

A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color).

Back

100% brown

Front

What is the dominant trait? Options: yellow pea seeds, green pea seeds, there is no dominant seed, Jolly green giant

Back

yellow pea seeds