monohybrid punnett square intro

Categorize the following as homozygous dominant, homozygous recessive, or heterozygous

Groups:

(a) Hom dominant

,

(b) hom recessive

,

(c) heterozygous

• tt

• Bb

• RR

• HH

• aa

• ee

• LL

• Tt

• Mm

Tags

NGSS.HS-LS3-1

A pea plant with yellow pods (homozygous dominant, YY) is crossed with a pea plant with green pods (homozygous recessive, yy). Determine the genotypic ratios of the offspring.

• 2 YY
  2 yy

• 2 YY
  1 Yy
  1 yy
  

• 1 YY

  2 Yy
  1 yy

• 4 Yy

A pea plant with yellow pods (homozygous dominant, YY) is crossed with a pea plant with green pods (homozygous recessive, yy). Determine the phenotype ratios of the offspring.

• 2 yellow; 2 green

• 1 yellow; 3 green
  

• 4 yellow

• 4 green

• 3 yellow; 1 green

In watermelons, green rinds (G) are dominant to striped rinds (g). What is the genotype of a heterozygous green watermelon?

• GG

• Gg

• gg

• green

Answer explanation

Correct! Heterozygous genotypes have one dominant and one recessive trait. In this case, that would be Gg.

Aa, DD, Bb, yy are all examples of

• genotypes

• phenotypes

Answer explanation

Correct! Genotypes are the genes an organism has that help code for proteins giving the phenotype (physical expression of the trait)

T - tall and t = short

In the punnett square below, what belongs in the missing square

• tt

• Tt

• Bb

• TT

Answer explanation

Correct! One parent gives a t in their gamete, and the other parent does as well, giving the genotype tt in the offspring.

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How many boxes would say BB?

• 1
• 2
• 4
• 0

What are the chances that the offspring will have homozygous recessive traits?

• 1 in 4

• 3 out of 4

• 75%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

The dominant trait is

• yellow pea seeds
• green pea seeds
• there is no dominant seed
• Jolly green giant

Tags

NGSS.MS-LS4-4