7th Sci: Genetics/Heredity Test Review

How is it possible for an organism to have a recessive phenotype for a trait such as white flowers in pea plants?

• The organism inherits the recessive allele from one parent.

• The organism inherits the recessive trait from both parents.

• The organism fails to inherit the allele for the trait from either parent.

• The organism acquires the trait from the environment.

The alleles for short stems is t. Which of the following represents a plant with short stems?

• tt

• TT

• Tt

• Tr

Which of the following answers correctly represents this Punnett Square if freckles are dominant?

• 25% chance freckles
• 50% chance freckles
• 75% chance freckles
• 100% chance freckles

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A genetic factor that blocks another genetic factor

• dominant

• recessive

A recessive trait is observed when _______ recessive genetic factors are present in the offspring.

• 0

• 1

• 2

• 3

Mendel concluded that ______factors control each trait.

• 2

• 4

• 3

• 5

Mendel studied _____plants.

• pea

• rose

• maze

In a punnett square a capital letter stands for a _____allele.

• dominant

• recessive

Which is homozygous recessive

• rr

• Rr

• RR

A ______ is part of the DNA code on a chromosome.

• gene

• genotype

• phenotype