Mixed Punnett Square Practice Challenge

The video tutorial covers various genetic concepts, including genotype, phenotype, and different types of dominance. It provides practice problems on albinism, radish color, fish color, whisker length, cattle coat color, and hemophilia. The tutorial also explains dihybrid crosses and offers guidance on solving genetic problems using Punnett squares.

What does the term 'genotype' refer to?

• The environment in which an organism lives

• The physical appearance of an organism

• The diet of an organism

• The genetic makeup of an organism

Tags

NGSS.MS-LS3-1

If an organism has a genotype of 'BB', what is its phenotype likely to be?

• Heterozygous

• Recessive

• Dominant

• Homozygous

In humans, what is the probability of a child having normal skin pigment if both parents are heterozygous for albinism?

• 100%

• 50%

• 75%

• 25%

What is the phenotype ratio when crossing a pink radish with a white radish?

• 50% pink, 50% white

• 75% pink, 25% white

• 25% pink, 75% white

• 100% pink

Tags

NGSS.MS-LS3-2

In codominance, what is the phenotype of an organism with the genotype 'RB'?

• Patchwork of red and blue

• Blue

• Red

• White

What is the genotype ratio of offspring from a cross between a homozygous long-whiskered seal and a heterozygous long-whiskered seal?

• 100% Ww

• 75% WW, 25% Ww

• 25% WW, 75% Ww

• 50% WW, 50% Ww

What is the probability of a son having hemophilia if the mother is a carrier and the father is normal?

• 25%

• 0%

• 50%

• 75%

In a dihybrid cross involving squash, what is the genotype of a true-breeding white squash that is heterozygous for dish shape?

• wwdd

• WWDd

• WwDd

• WWDD

What is the phenotype ratio of offspring from a cross between two medium-tailed raccoons?

• 75% medium, 25% narrow

• 100% medium

• 50% wide, 50% narrow

• 25% wide, 50% medium, 25% narrow

In a dihybrid cross involving pea plants, what is the phenotype of a plant with the genotype 'ggtt'?

• Green and tall

• Yellow and short

• Green and short

• Yellow and tall