CH 12

​ (a)   are ​ (b)   versions of the same ​ (c)  

• Alleles
• different
• gene

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

​ Homologous ​ (a)   are the ​ (b)   chromosomes from our mom and dad

• chromosomes
• matching

Tags

NGSS.HS-LS3-1

In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

The observable traits of an organism are known as its

• allele
• dominance
• phenotype
• genotype

Each parent contributes one of the genes for a particular trait. The genes of the pair are called:

• variables
• gametes
• hybrids
• alleles

The gene makeup of an organism for a particular trait is known as its

• dominance
• phenotype
• allele
• genotype

What is the percentage of homozygous recessive offspring?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What percentage of the offspring will be purebred dominant?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

Assuming that both parent plants in the diagram above are homozygous, why would all of the f1 generation have yellow phenotypes?

• because the f1 genotypes are homozygous

• because yellow is dominant over green

• because both parents passed on yellow alleles

Tags

NGSS.HS-LS3-1

In the diagram above, what accounts for the green pea seed in the f2 generation?

• The f1 generation parents are heterozygous.

• The yellow allele is dominant over the green one.

• The f1 generation parents are homozygous yellow.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2