Biology Genetics Review

Yellow and smooth are dominant traits for peas. Which are possible genotypes for a pea plant that produces yellow, smooth peas.

• YYSS

• YySs

• yyss

• Yyss

• YySS

Yellow and smooth are dominant traits for peas. Which are possible genotypes for a pea plant that produces green, wrinkled peas.

• YYSS

• YySs

• yyss

• Yyss

• YySS

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which genotype(s) represent a homozygous individual?

• Rr

• rr

• RR

Which genotype(s) represent a heterozygous individual?

• Rr

• rr

• RR

Which phenotype ratio would be expected from a cross of two individuals heterozygous for two traits? BbRr X BbRr

• 9:3:3:1

• 4:4:4:4

• 8:8

• none of the answers is correct

Tags

NGSS.HS-LS3-3

Two individuals with brown, smooth fur (homozygous recessive for both traits) are crossed (bbrr x bbrr). What is the expected genotypic outcome?

• 9:3:3:1

• 4:4:4:4

• 50% homozygous recessive for both traits; 50% heterozygous for both traits

• 100% bbrr

• 100% brown, smooth fur

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two individuals with brown, smooth fur (homozygous recessive for both traits) are crossed (bbrr x bbrr). What is the expected phenotypic outcome?

• 9:3:3:1

• 4:4:4:4

• 50% homozygous recessive for both traits; 50% heterozygous for both traits

• 100% bbrr

• 100% brown, smooth fur

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A flower exhibits codominance. A red flower is crossed with a white flower. What is the expected phenotypic outcome?

• 100% pink

• 100% red & white spotted

• 100% red

• 100% white

A flower exhibits incomplete dominance. A red flower is crossed with a white flower. What is the expected phenotypic outcome?

• 100% pink

• 100% red & white spotted

• 100% red

• 100% white

Tags

NGSS.HS-LS3-1

A flower exhibits Mendelian inheritance for color; red is dominant. A red flower is crossed with a white flower. What is the expected phenotypic outcome?

• 100% pink

• 100% red & white spotted

• 100% red

• 100% white

Tags

NGSS.HS-LS3-1