Genetics

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1. What does heterozygous mean?

  • Having two different alleles of the same gene.
  • Having two of the same alleles of the same gene.
  • Two different locus are the same.
  • Two different locus on one chromosome
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2. Are ABO blood groups co-dominant?

  • Yes
  • No

3. What does it mean when a disease is sex-linked?

  • It is a disease that can only be recessive.
  • where a gene is located on the sex chromosome.
  • It is a disease that can only be found on the Y chromosome.
  • It is a disease that can only be found on the X chromosome.

4. What is a test cross?

  • Testing a suspected heterosygote by crossing it with a known homozygous recessive.
  • Testing a suspected homozygote by crossing it with a known heterozygous recessive.
  • Testing a suspected heterozygote by crossing it with a known homozygous recessive
  • Testing a suspected homozygote by crossing it with a known homozygous recessive.

5. What are codominant alleles?

  • Pairs of alleles that both affect the phenotype when present in a heterozygote.
  • Alleles that are the same.
  • Pair of alleles that do not affect the phenotype when present in a heterosygote.
  • Alleles that are different.

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