Biology Exam 4 Pt. 2

5 Questions | By Hisjuliet | Updated: Mar 20, 2022 | Attempts: 225

Study quiz for final

Questions and Answers

1.

A woman of blood group A has a child with a man of blood group B. The child's blood is type O. What must be the genotype of the parents?
- A.
  
  Mother: I(A)I(A); father I(B)I(A)
- B.
  
  Mother: I(A)i(O); father: I(B)I(B)
- C.
  
  Mother: I(A)i(O); father I(B)i(O)
- D.
  
  Mother: I(A)i(O); father I(B)I(B)
- E.
  
  It is impossible for these individuals to have a chlld with type O blood.
2.

Cocominance
- A.
  
  Is when heterozygotes show a phenotype intermediate between those of the two homozygotes.
- B.
  
  Involves the expression of both alleles at a locus producing two different phenotypes.
- C.
  
  Is only found in mammalian enzyme production.
- D.
  
  Involves one allele having more than one phenotypic effect.
- E.
  
  Would result in pink flowers from a cross between white and red flowers.
3.

In Mendel's experiments, if the allele for tall (7) plants was incompletely dominant over the allele for short (t) plants, what offspring would have resulted from crossing two Tt plants?
- A.
  
  1/4 tall; 1/2 intermediate height; 1/4 short
- B.
  
  1/2 tall; 1/4 intermediate height; 1/4 short
- C.
  
  1/4 tall; 1/4 intermediate height; 1/2 short
- D.
  
  All tall offspring
- E.
  
  All intermediate height offspring
4.

Classical albinism results from a recessive allele. Which of the following is the expected ratio for the progeny when a normally pigmented male with an albino father has children with an albino woman?
- A.
  
  3/4 normal; 1/4 albino
- B.
  
  3/4 albino; 1/4 normal
- C.
  
  1/2 normal; 1/2 albino
- D.
  
  All normal
- E.
  
  All albino
5.

A human male carrying an allele for a trait on the X chromosome is
- A.
  
  Heterozygous.
- B.
  
  Homozygous.
- C.
  
  Hemizygous.
- D.
  
  Monozygous.
- E.
  
  Holozygous.