Genotypes/Genetics

Two fruit flies are crossed: one is heterozygous for red eyes, and the other is homozygous recessive for white eyes. What are the genotypes of the parents?

• Rr x Rr

• Rr x rr

• Rr x RR

• RR x rr

Tags

NGSS.HS-LS3-1

Two mice are crossed: one is heterozygous for brown fur while the other is homozygous recessive for black fur. What are the genotypes of the parents?

• Bb x bb

• bb x BB

• Bb x BB

• BB x Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A homozygous dominant pea plant for round seeds is crossed with a heterozygous plant for the same trait. What will the genotypes of the parents be?

• RR x rr

• rr x RR

• Rr x Rr

• RR x Rr

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a certain bird species, blue feathers (B) are dominant to gray feathers (b). What would the parent genotypes be if they are heterozygous for feather color?

• bb x Bb

• Bb x Bb

• BB x bb

• Bb x BB

Tags

NGSS.HS-LS3-2

A heterozygous individual for freckles (F) is crossed with a homozygous recessive individual for no freckles (f). What are the genotypes of the offspring?

• FF x ff

• ff x FF

• Ff x Ff

• Ff x ff

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In cats, long hair (L) is recessive to short hair (l). If a short-haired cat is crossed with a long-haired cat, and all offspring have shFlort hair, what are the possible genotypes of the parents?

• Ll x ll

• ll x ll

• Ll x Ll

Tags

NGSS.HS-LS3-1

Two pea plants, one homozygous dominant for yellow seeds and the other heterozygous for yellow seeds, are crossed. What are the genotypes of the parents?

• YY x yy

• yy x yy

• YY x Yy

• Yy x Yy

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two mice are crossed: one is homozygous recessive for white fur and the other is heterozygous for black fur (black is dominant). What are the genotypes of the parents?

• bb x BB

• bb x Bb

• BB x BB

• bb x bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a plant species, red flowers (R) are dominant to white flowers (r). A heterozygous plant is crossed with a homozygous recessive plant. What are the possible genotypes of the offspring?

• Rr x rr

• Rr x RR

• RR x RR

• RR x rr

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two rabbits with white fur are crossed. Black fur (B) is dominant to white fur (b). What are the genotypes of the parents?

• BB x Bb

• bb x bb

• BB x BB

• Bb x Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2