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6. DNA strands are polymers made up of lots of repeating units called ..?

  • gametes
  • enzymes
  • nucleotides
  • amino acids

7. what type of reproduction has the disadvantage of possibly passing diseases to their offspring?

  • both
  • sexual
  • asexual

8. which of these are not part of a DNA strand?

  • phosphate
  • base
  • sugar
  • ribosomes
  • nucleotide

9. what does homozygous mean?

  • two of the same alleles
  • two different alleles

10. what type of reproduction has the advantage of only one parent required?

  • both
  • asexual
  • sexual

11. what is the structure of DNA

  • chromosomes
  • amino acids
  • double helix
  • spiral

12. what does heterozygous mean?

  • two different alleles
  • two of the same alleles

13. what is the chance of male gametes (sperm) carrying the X chromosome?

  • 50%
  • 100%
  • 25%
  • 0%

14. what type of reproduction has the advantage of variation in the offspring?

  • sexual
  • asexual
  • both