Genetics

What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?

• Ry

• rrYy

• RrYy

• Rryy

Based off the image, what fraction of this generation has wrinkled, yellow seeds

• 1/4

• 9/16

• 3/16

• 3/4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

The pollen of flower with red (RR) flowers is transferred to a plant with white (rr) flowers. The flower produced from this match is pink. What kind of dominance does this represent?

• Recessive dominance

• Incomplet dominance

• Codominance

• Assertive dominance

Which Mendelian law is represented by the ratios seen in a monohybrid cross?

• Law of Segregation

• Law of Independent Assortment

• Incomplete dominance

• Heterozygous alleles

What is the genotype for this organism?

(E= 3 eyes, e= 1 eye)

• ee

• EE

• Ee

• EE or Ee

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If a pea plant were homozygous recessive for height, how would its alleles be represented?

• TT

• Tt

• tt

• TtTt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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-LS3-3

One of the parents of a child has phenylketonuria (PKU), which is caused by recessive alleles. The other parent does not have the PKU alleles. What is the chance that the couple will have a child with phenylketonuria?

• 0%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The observable traits of an organism are known as its

• allele
• dominance
• phenotype
• genotype

Tags

NGSS.HS-LS3-3

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

• variables
• gametes
• hybrids
• alleles

Tags

NGSS.HS-LS3-1