1 What is this an example of

1
1) What is this an example of?

• A single pair of alleles that code for Cystic
  Fibrosis causes clogged blood vessels, overly
  sticky mucus, salty sweat, liver and pancreas
  failure, and lots of other signs and symptoms.

2
2) What is this an example of?

• Coat color in guinea pigs where Bblack coat,
  and bbrown coat. The expression of either
  phenotype depends on the presence of a dominant
  allele at another locus Callele that codes for
  the enzyme tryosinase, which converts a colorless
  precursor to the pigment melanin, which is
  required for the production of any kind of
  pigment. The same thing happens in corn seed
  color and Labrador coat color.

3
3) What is this an example of?

• Pod shape and plant height of peas, and body
  color and wing type in fruit flies are close
  together on the same chromosome and therefore
  tend to be inherited together.

4
4) What is this an example of?

• Alleles at gt 3 different
• loci affect the skin
• color of humans,
• alleles at gt 10
• different loci
• affect height in
• humans.

5
Answers

• Slide 1 pleiotrophy
• Slide 2 epistasis
• Slide 3 linked traits/genes
• Slide 4 polygenic/polylocus traits