AP Bio Unit 5 (Mendelian Genetics)

"True-breeding" individuals have a ____ gentoype.

• Homozygous

• Heterozygous

According to the rules of Mendelian inheritance, a heterozygous individual will have the ____ phenotype.

• Dominant

• Intermediate

• Recessive

Which law of Mendelian inheritance states that the two alleles of a genotype will separate into different haploid cells during meiosis?

• Law of Independent Assortment

• Rule of Dominance

• Law of Segregation

• Rule of Inheritance

In pea plants, purple flowers are dominant and white flowers are recessive. Suppose two purple-flowered parents produce 100 offspring. 27 of those offspring have white flowers. What are the genotypes of the parents?

• PP x Pp

• Pp x Pp

• PP x PP

• PP x pp

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In pea plants, yellow seeds are dominant over green seeds. A true-breeding yellow-seeded plant is crossed with a true-breeding green-seeded plant. What would be the expected phenotypes in the offspring?

• 100% green seeds

• 75% yellow seeds, 25% green seeds

• 50% yellow seeds, 50% green seeds

• 100% yellow seeds

Tags

NGSS.HS-LS3-1

In pea plants, yellow seeds are dominant over green seeds, and round seeds are dominant over wrinkled seeds. A pea plant with yellow, round seeds is crossed with a pea plant with green, round seeds. They have 1000 offspring. All of them have round seeds, and approximately 1/2 of them have yellow seeds. What are the most likely genotypes of the parents?

• YyRr x YyRr

• YyRR x yyRr

• YyRr x YYRr

• YyRr x yyRr

Tags

NGSS.HS-LS3-1

In pea plants, yellow seeds are dominant over green seeds, and round seeds are dominant over wrinkled seeds. A true-breeding plant with green, wrinkled seeds is crossed with a heterozygous plant with yellow, round seeds. What are the expected phenotype probabilities in their offspring?

• 100% yellow, round offspring

• 9/16 yellow round

  3/16 yellow wrink.

  3/16 green round

  1/6 green wrink.

• 25% of each phenotype combination

• 50% yellow, round offspring & 50% green, wrinkled offspring

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In pea plants, tallness is dominant over shortness, and purple flowers are dominant over white flowers. A heterozygous tall plant with white flowers is crossed with a heterozygous tall plant that is true-bred for purple flowers. What is the probability that these plants would produce short offspring with white flowers?

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

NGSS.HS-LS3-2

In a monohybrid cross of complete dominance, what is the phenotypic ratio?

• 1:2:1

• 3:1

• 9:3:3:1

• 12:4

Tags

NGSS.HS-LS3-3

In a population of 100 offspring, how many would you expect to be homozygous dominant in a cross between a homozygous dominant and a homozygous recessive parent?

• 0

• 25

• 50

• 75

• 100

Tags

NGSS.HS-LS3-3