Punnett Squares & Genetics

What is a GENOTYPE?

• the genetic make-up of an organism

• the physical trait of an organism

• mitosis

• meiosis

Which of the following are GENOTYPES? (select all correct answers)

• black hair

• homozygous dominant

• heterozygous

• blue eyes

• BB

PHENOTYPE is

• the genetic make-up of an organism

• the physical trait of an organism

• nucleic acid

• Aa

Which of the following are PHENOTYPES?

• green skin

• Aa

• homozygous recessive

• purple eyes

• black fur

The prefix "homo" means

• different

• same

• tomorrow

• never

The prefix "hetero" means

• different

• ugly

• fancy

• same

If A = red fur and a = white fur, what are the PHENOTYPIC ratios of the offspring based on the Punnett Square?

• 25% heterozygous

• 50% purple

• 75% red fur and 25% white fur

• 25% homozygous recessive, 50% heterozygous, 25% homozygous dominant

If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring in the Punnett square?

• 100% green pods

• 100% yellow pods

• 100% heterozygous

• 100% homozygous dominant

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive

• dominant

• both

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

• 0 %

• 25%

• 50%

• 75%