Meiosis and Mendelian Genetics

In pea plants, round seeds (R) are dominant to wrinkled seeds (r). Which of the following represents the genotype of a pea plant that is heterozygous?

• RR

• round

• Rr

• wrinkled

• rr

In pea plants, round seeds (R) are dominant to wrinkled seeds (r). Which of the following represents the genotype of a pea plant that is homozygous dominant?

• RR

• round

• Rr

• wrinkled

• rr

Tags

NGSS.HS-LS3-1

In mice, black fur (B) is dominant to white fur (b). According to the Punnett square shown, the offspring in box 4 would:

• be white.

• be heterozygous.

• be gray.

• be homozygous.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

In many plants, tall (T) is dominant to short (t). In the cross shown here, the genotype of both parents is:

• tall.

• short.

• homozygous.

• heterozygous.

Tags

NGSS.HS-LS3-1

In humans, having freckles (F) is dominant to not having freckles (f). What is the percent chance that a married couple with no freckles will give birth to a child who has freckles?

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

NGSS.HS-LS3-3

In humans, having freckles (F) is dominant to not having freckles (f).

Two people with freckles get married and give birth to three children. Two of the kids have freckles and one does not.

What is the genotype of the parents?

• FF and FF

• Ff and Ff

• FF and Ff

• Ff and ff

Tags

NGSS.HS-LS3-1

Green peas are dominant (G) to yellow peas (g). What is the phenotype for a heterozygous offspring?

• Gg
• gg
• GG
• Green

• Yellow

Tags

NGSS.HS-LS3-2

What do you call the physical expression of a gene?

• genotype
• dominant
• phenotype
• allele

Tags

NGSS.HS-LS4-4

The different forms of a gene are called

• traits
• pollinators
• alleles
• hybrids

During meiosis, the homologous pairs of chromosomes and the matching alleles are lined up independently.

Offspring are a mix of maternal genes and paternal genes.

This increases genetic variation.

• Homozygous Dominant

• Law of Segregation

• Crossing Over

• Independent Assortment

Tags

NGSS.HS-LS3-2