Genomic imprinting, DNA methylation, and histone acetylation are all examples of

Question

Genomic imprinting, DNA methylation, and histone acetylation are all examples of A) genetic mutation. B) chromosomal rearrangements. C) karyotypes. D) epigenetic phenomena. E) translocation. How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbcCDdEE? A)4 B) 8 C) 16 D) 32 E) 64 Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What fraction of the progeny of crosses BbTt times BBtt will be expected to have black fur and long tails? A) 1/16 B) 3/16 C) 3/8 D) 1/2 E) 9/16 Cystic fibrosis affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this? A) incomplete dominance B) multiple alleles C) pleiotropy D) epistasis E) codominance Which of the following is an example of polygenic inheritance? A) pink flowers in snapdragons B) the ABO blood group in humans C) Huntington's disease in humans D) white and purple flower color in peas E) skin pigmentation in humans When Thomas Hunt Morgan crossed his red-eyed F_1 generation flies to each other, the F_2 generation included both red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation for this result? A) The gene involved is on the Y chromosome. B) The gene involved is on the X chromosome. C) The gene involved is on an autosome, but only in males. D) Other male-specific factors influence eye color in flies. E) Other female-specific factors influence eye color in flies. An obstetrician knows that one of her patients is a pregnant woman whose fetus is at risk for a serious disorder that is detectable biochemically in fetal cells. The obstetrician would most reasonably offer which of the following procedures to her patient? A) CVS B) ultrasound imaging C) amniocentesis D) blood transfusion E) X-ray

Explanation / Answer

1) Answer is D

Epigenetic phenomenon

These are heritable ,alternative gene expression, molecular function, or organization specified by the same DNA sequence.

2) If each of the genes is not linked to any others, and 2 possibilities for the first (A or a), 2 for the second gene (B or b), 1 for the third (C), 2 for the fourth (D or d) and 1 for the fifth (E).

2 x 2 x 1 x 2 x 1 = 8

The answer is B

3) Answer is D 1/2

Bb x BB for the fur trait = black furred offspring. tail length trait = Tt x tt ,produces =phenotype value of 1/2 of the progeny with short tails.

BB x Bb = 1:1 genotype but all one phenotype as each will get a dominant allele B_
Tt x tt => 1:1 genotypes and 1:1 phenotypes

4) Answer is C pleiotropy

5) Answer is E

Skin pigmentation in humans ,rest are examples of discrete characters which is encoded by a single locus. Skin pigmentation involve multiple loci, therefore, example of polygenic inheritance.

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.