HUMAN CHROMOSOME

A red flower (Rr) is crossed with a pink flower (r). Describe the genotype of the offspring. (Be sure to remember that the capital letter is dominant).

• 50% heterozygous and 25% homozygous recessive

• 100% homozygous recessive

• 50% heterozygous and 50% homozygous recessive

• 25% heterozygous and 50% homozygous

Tags

NGSS.HS-LS3-1

A long eyelash (LL) is crossed with another long eyelash (Ll). What is the phenotype of the offspring?

• 50% homozygous dominant; 50% heterozygous; 100% long eyelash

• 25% homozygous dominant; 75% heterozygous; 100% short eyelash

• 100% homozygous dominant; 100% long eyelash

• 50% homozygous dominant; 50% heterozygous; 100% short eyelash

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A tall plant (Tt) is crossed with a short plant (tt). What is the genotype of the offspring?

• 25% heterozygous; 75% homozygous

• 100% heterozygous

• 100% homozygous dominant

• 50% heterozygous; 50% homozygous dominant

  
  

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A green plant (Gg) is crossed with a yellow plant (gg). What is the phenotype of the offspring?

• 75% tall; 25% short

• 50% tall; 50% short

• 25% tall; 75% short

• 100% tall

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A blue eye (bb) is crossed with another blue eye (bb). What is the genotype of the offspring?

• 100% homozygous recessive

• 100% heterozygous dominant

• 100% homozygous dominant

• 100% heterozygous recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

An orange feather (oo) is crossed with another orange feather (oo). What is the phenotype of the offspring?

• 75% orang; 25% red

• 75% red; 25% orang

• 100% orange

• 100 % red

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A red bird (RR) is crossed with a red bird (RR). What is the genotype and phenotype of the offspring?

• 100% heterozygous; 50% red

• 100% homozygous dominant; 100% red

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A violet leaf (Vv) is crossed with a gre leaf (vv). What is the genotype of the offspring?

• 100% homozygous dominant

• 100% homozygous recessive

• 50% heterozygous; 50% homozygous recessive

• 50% heterozygous; 50% homozygous dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A homozygous dominant brown hamster (BB) is crossed with a heterozygous brown hamster (tan is the recessive color). List the offspring genotype and phenotype.

• 75% homozygous dominant; 25% heterozygous and 100% tan

• 50% homozygous dominant; 50% heterozygous and 100% tan

• 50% homozygous dominant; 50% heterozygous and 100% brown

• 25% homozygous dominant; 75% heterozygous; 100% brown

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two heterozygous white (brown fur is recessive) rabbits are crossed. What is their genotype?

• 50% homozygous dominant; 50% heterozygous

• 25% homozygous domestic; 75% homozygous recessive

• 25% homozygous domestic; 25% homozygous recessive; 50% heterozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2