AP Bio Advanced Genetics

Which of the following statements best describes what a Barr body is and its significance?

• it is an inactivated Y chromosome and results in a man being sterile
• It is an inactivated Y chromosome, and the person who has it appears female
• It is an inactivated X chromosome and results in females with half their cells have one X inactivated and in the other half of their cells have the other X inactivated
• it is an inactivated X chromosome and results in females who are sterile

Which of the following is an example of polygenic inheritance?

• pink flowers in snapdragons

• The ABO Blood group in humans

• Skin color in humans

• Huntington's disease in humans

Suppose the cross-over percentages for three gene pairs are: A to B = 9.5%, B to C = 14.5%, and A to C = 5%. Which of the following sequences could represent the order of these genes on a chromosome?

• CAB

• ABC

• CBA

• ACB

Tags

NGSS.HS-LS3-3

If you cross AaBbCc x AABbcc, what's the chance of getting an AABBcc offspring?

• 12.5%

• 50%

• 6.25%

• 3.13%

Tags

NGSS.HS-LS4-3

Australian Shepherds are a breed of dogs whose coat color is directly impacted by two different genes. The gene that determines basic coat color exhibits a dominant allele (B) for black coat color and a recessive allele (b) for red coat color. Additionally, these dogs can have a solid coat color (mm) or a mixed pattern coat color called merle (Mm). The homozygous dominant coat color is called a lethal white (MM) which produces pups that are deaf and blind. What is the probability that two red Australian shepherds will produce a black pup?

• 0
• 1/4
• 1/2
• 3/4

Tags

NGSS.HS-LS4-3

In horses, the grey coat color (G) is dominant to non-grey coat color (g). Additionally, some horses have a genetic disorder called hyperkalemic periodic paralysis or HYPP. HYPP is an inherited autosomal dominant disorder that affects the sodium channels in muscle cells. HYPP (H) is dominant to the normal condition (h). If a non-grey, normal stallion sires a foal that is not grey and does not have HYPP, which of the following genotypes are possible genotypes for the mother?

• GGhh and ggHH
• ggHH and GgHh
• GGHH and GGHh
• GgHh and gghh

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

process by which information encoded in a gene is used to synthesize a functional gene product, such as a protein, which results in the phenotypic manifestation of the gene.

• gene expression

• genetics

• genotype

• phenotype

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

If a father is AA and a mother is AB, what is the probability for a child with AB blood? 

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

The genotype of the affected son and daughter at the bottom of this pedigree must be...

• AA

• aa

• Aa

• X^aY and X^aX^a

Tags

NGSS.HS-LS3-1

Which of the following statements is true regarding blood types?

• A and O are codominant, B is recessive.
• B and O are codominant, A is recessive.
• A and B are codominant, O is recessive.
• A , B and O are all codominant with each other.