etH thumbtack albinism meiosis 2.28.24

Which best describes epistasis?

• An allele that changes the genotype of another allele

• A gene that changes the genotype of another gene

• An allele that controls or masks the expression of another allele

• A gene that controls or masks the expression of another gene

In humans, B is the allele for brown eyes and b is the allele for blue eyes. Two brothers both have brown eyes, but one of them has both the B and b  alleles while the other only has B  alleles. Which statement is true about the brothers?

• They have the same genotype and phenotype.

• They have different phenotypes and genotypes.

• They have the same phenotype but different genotypes.

• They have the same genotype but different phenotypes.

Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.

• 23, 46
• 46, 23
• 2, 4
• 50, 100

What kind of cells are made in meiosis?

• Haploid Gametes

• Diploid Somatic Cells

• Diploid Gametes

• Haploid Somatic Cells

A die is rolled. What is the probability that the result is less than 3 ?

• 1/2
• 1/3
• 1/4
• 1/6

What is the probability that AaBBddEe x AABbddEE will have offspring with the genotype AaBbddee

What questions do you have about our current topic?

A coin is flipped. What is the probability of getting heads?

• 1/2

• 1/3

• 1/4

• 0

Which process is necessary for the growth and repair of body tissues?

• Meiosis

• Mitosis

• Fertilization

• Photosynthesis

In pea plants, R is the allele for tall plants and r is the allele for short plants. If a plant with the genotype Rr is crossed with a plant with the genotype rr , what is the probability of producing a tall plant?

• 100%

• 75%

• 50%

• 25%