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

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.

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.

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%

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.

Both parents must have which genotype?

• FF

• Ff

• ff

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

• Gg
• gg
• GG
• Green

• Yellow

What do you call the physical expression of a gene?

• genotype
• dominant
• phenotype
• allele

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