Monohybrid Genetics

Aa is an example of

• homozygous dominant
• homozygous recessive
• heterozygous
• none of these

Tags

NGSS.HS-LS3-1

bb is an example of

• homozygous dominant
• homozygous recessive
• heterozygous
• none of these

Tags

NGSS.HS-LS3-1

Recessive alleles are written using

• capital
• lowercase
• both
• neither

AA is an example of 

• homozygous dominant
• homozygous recessive
• heterozygous
• none of these

Tags

NGSS.HS-LS3-1

Which of the following is a genotype?

• long hair
• blue eyes
• Gg
• tall

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following is a phenotype?

• AA
• AB
• black fur
• Tt

Tall is dominant to short. A homozygous tall plant is crossed with a short plant. What will be the phenotypes of the offspring?

• 100% tall
• 50% tall, 50% short
• 75% tall, 25% short
• 25% tall, 75% short

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Green is dominant to yellow. Two heterozygous green plants are crossed. What are the genotypes of the offspring?

• 100% Gg
• 50% GG, 50% Gg
• 25% GG, 50% Gg, 25% gg
• 75% Gg, 25% gg

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?

• 100% Pp (purple)
• 50% Pp (purple); 50% pp (white)
• 75% Pp (purple); 25% pp (white)
• 25% PP, 50% Pp, 25% pp
  75% purple, 25% white

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

An organism with two different alleles for a trait is said to be: 

• recessive
• hybrid
• dominant
• purebred

Tags

NGSS.HS-LS3-1