Traits and Probability Notes

1
Traits and Probability Notes

• 2c. Random chromosome segregation explains the
  probability that a particular allele will be in a
  gamete.

2
Objectives

• Describe monohybrid and dihybrid crosses.
• Explain how heredity can be illustrated
  mathematically.

3
Vocabulary

• Law of independent assortment

4

• Punnett squares illustrate genetic crosses.

5

• A monohybrid cross involves one trait.

6

• Homozygous Homozygous
• (Figure on board)

7

• Heterozygous Heterozygous
• (Figure on board)

8

• Heterozygous Homozygous
• (Figure on board)

9

• A dihybrid cross involves two traits.

10
Law of independent assortment

• Mendels second law, stating that different
  traits appear to be inherited separately.

11

• Dihybrid cross
• (Figure on board)

12
Sex Chromosome Inheritance

• The gametes from an XY male determine the sex of
  the offspring.
• (figure on board)