Fast and the Curious Week 27: Science 8

If the dominant trait is having freckles (F) and the recessive trait is no freckles (f), which allele combination(s) below would represent a person who has freckles? (select all that apply)

• FF

• Ff

• ff

What belongs in the last box?

• RR

• Rr

• rr

• ff

Both parents in this Punnet square

• are homozygous dominant
• are homozygous recessive
• are heterozygous
• have blue eyes

Brown eyes (B) tend to be dominant whereas blue eyes (b) tend to be recessive. Parents with heterozygous genes want to know: what is the likelihood of them having a child with blue eyes?

• 0%

• 25%

• 75%

• 100%

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

​Possible offspring of two people who are heterozygous for earlobe attachment are shown. What is the probability of having a child who has attached earlobes?

• 25%

• 50%

• 75%

• 100%

How many divisions occur in meiosis?

• One

• Two

• Four

• Six