Genetics and Meiosis

Parkinson's disease is a disorder of the central nervous system that affects movement. Patients with Parkinson's disease often have tremors. Parkinson's disease is an autosomal dominant disorder.

Suppose that Teresa's genotype is (Pp) and her husband's genotype is (pp). What are the chances that their son, Richard, will also have Parkinson's?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Horses can have different coat colors. Assume that coat color in horses is determined by a single gene and that the allele for a black coat (B) is dominant over the allele for a red coat (b). In a cross between two horses that have red coats, what percentage of the offspring will have black coats?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

Kangaroos are common animals in Australia. Most kangaroos have a light brown coat but every once in a while a kangaroo might be born with a genetic condition called albinism in which their coat is white. Albinism is a recessive disorder. If two kangaroos with normal coat coloring mate and have an albino kangaroo, what can we say about their genotypes?

• Both parents are homozygous dominant

• Both parents are heterozygous

• Both parents are homozygous recessive

• There is not enough information to determine the genotype of the parents

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans, brown eyes are dominant to blue eyes. A homozygous brown-eyed human (BB) is crossed with a homozygous blue-eyed human (bb). What is the predicted phenotypes of the offspring?

• All offspring will have blue eyes

• All offspring will have brown eyes

• Of the offspring, 75% will have blue eyes and 25% will have brown eyes

• Of the offspring, 75% will have brown eyes and 25% will have blue eyes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the genotype of individual 5 in generation III?

• FF

• Ff

• ff

• The genotype cannot be determined from the information provided

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Blahblah birds are a common bird in the forests of Oz. A cross between a blue blahblah bird (BB) and a white blahblah bird (WW) produces offspring that are silver (BW). What kind of inheritance pattern is this called?

• Classic dominance

• Incomplete dominance

• Codominance

• Sex-linked trait

The eye color of Drosophila fruit flies is an x-linked trait. Read eyes (R) are dominant over white eyes (r). In a cross between a white eyed female and a red eyed male, what will be their phenotypes of their offspring?

• All offspring will have white eyes

• All females will have red eyes and all males will have white eyes

• All males will have red eyes and all females will have white eyes

• Half of the males and females will have red eyes and half of the males and females will have white eyes

Tags

NGSS.HS-LS3-1

What will most likely cause a mutation that will be passed on to future offspring?

• A gamete with one less chromosome

• Vaping smoke altering a single gene in the lungs

• Acid spill altering nerve cell function

• Chemotherapy changing the DNA sequence in heart cells

Tags

NGSS.HS-LS3-2

Gametes must be _________ because ___________.

• haploid; two gametes will unite during fertilization to create a diploid zygote

• diploid; two gametes will unite during fertilization to create a diploid zygote

• haploid; two gametes unite during fertilization to create a haploid zygote

• diploid; two gametes unite during fertilization to create a haploid zygote

Tags

NGSS.HS-LS3-2

How is this trait inherited?

• Autosomal dominant

• Autosomal recessive

• Sex-linked dominant

• Sex-linked recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2