Genetics Grade

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• yellow

Which of the following is homozygous dominant?

• Yy
• Y
• yy
• YY

Which of the following is a possible blood type for offspring produced from parents who have AB blood and O blood?

• A

• AB

• O

• All of these

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

If yellow seeds are dominant to green seeds, what is the probability that a cross between two plants with green seeds will produce a plant with yellow seeds?

• 100%

• 75%

• 50%

• 0%

A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:

• all black
• all white
• all gray
• speckled black and white

Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?

• Red and white spotted

• Red

• Pink

• White

On a pedigree, this symbol represents a ---

• not affected female.

• not affected male.

• affected male.

• affected female.

If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?

• HH

• Hh

• hh

The woman who is colorblind marries a man with normal vision. What is the probability that their sons will be colorblind?

• 0%

• 25%

• 50%

• 100%