Biology Exam 4 Pt. 2
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Study quiz for final
- 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.
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