Biology Sem 2 Final Exam Review 1

10 Questions | By Kath0915 | Last updated: Mar 20, 2022 | Total Attempts: 226

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This quiz provides practice on the content and skills described under "inheritance" on the MCPS Biology B Final Exam Review 2010.

Questions and Answers

1.

In snipes, the allele for brown feathers (B) is dominant over the allele for white feathers (b). A homozygyous recessive snipe is crossed with a heterozygyous snipe. What is the phenotype of the parents?
- A.
  
  White, bb
- B.
  
  Brown, Bb
- C.
  
  Bb, Bb
- D.
  
  White, brown
2.

In snipes, the allele for brown feathers (B) is dominant over the allele for white feathers (b). A homozygyous recessive snipe is crossed with a heterozygyous snipe. What percentage of the offspring will be white?
- A.
  
  100%
- B.
  
  75%
- C.
  
  50%
- D.
  
  25%
3.

In snipes, the allele for brown feathers (B) is dominant over the allele for white feathers (b). A cross of two snipes produced 16 offspring--all heterozygous. What were the likely genotypes of the parents?
- A.
  
  BB and bb
- B.
  
  Bb and Bb
- C.
  
  Bb and Bb
- D.
  
  BB and Bb
4.

Dreissena polymorpha, the zebra mussel, is a species of mussel that is native to East European waterways. They are not native to the Great Lakes, but they have been introduced there. Researches believe that zebra mussels are ten times more effective in removing toxic contaminants from polluted water than are native mussels. Which of these experiments would test this hypothesis?
- A.
  
  Place 20 zebra mussels in a tank with PCBs and 20 zebra mussels in another tank without PCBs. Test PCB levels of each tank after one week.
- B.
  
  Place 20 zebra mussels in a tank with PCBs and 20 native mussels in another tank without PCBs. Test PCB levels of each tank after one week.
- C.
  
  Place 20 zebra mussels in a tank with PCBs and 20 native mussels in another tank with PCBs. Test PCB levels of each tank after one week.
- D.
  
  Place 20 native mussels in a tank with PCBs and 20 native mussels in a tank without PCBs. Test PCB levels of each tank after one week.
5.

A farmer wants to produce a herd of cattle that are homozygyous for the heavy allele (H). To be certain that all the offspring will be homozygyous for this trait, what must be true of the parent cattle?
- A.
  
  They both must be heterozygyous.
- B.
  
  They both must have the genotype HH.
- C.
  
  They must be clones of each other.
- D.
  
  They must be related.
6.

In what organs of the reproductive system does meiosis take place?
- A.
  
  thyroid gland and pancreas
- B.
  
  gamete and zygote
- C.
  
  Testis and ovary
- D.
  
  Sperm and egg
7.

Which of the following processes produces haploid gametes?
- A.
  
  Cellular respiration
- B.
  
  Fertilization
- C.
  
  Meiosis
- D.
  
  DNA replication
8.

Why is meiosis a necessary part of sexual reproduction?
- A.
  
  Because cells must be produced which contain half the number of chromosomes before fertilization can occur.
- B.
  
  Because daughter cells must be identical to parent cells.
- C.
  
  Because meiosis increases the attractiveness of a potential mate.
- D.
  
  Because meiosis produces zygotes.
9.

Two erect-eared rat terriers were crossed. In the resulting litter of eight puppies, 3 had tipped ears. What do these results indicate about the dominant and recessive alleles for ear erectness?
- A.
  
  The allele for erect ears is dominant.
- B.
  
  The allele for erect ears is recessive.
- C.
  
  The allele for tipped ears is dominant.
- D.
  
  The allele for tipped ears is recessive.
10.

An inherited disorder called hemophelia occurs far more often in boys than in girls. This indicates that hemophelia is
- A.
  
  Caused by a spontaneous mutation
- B.
  
  The result of a diseased sperm
- C.
  
  Dominant allele-based disease
- D.
  
  Sex-linked trait