1. Do Now Take each of the papers at the front lab table
Write your name and the date on each
Take out your section sheet from this week and yesterday’s sub classwork.

2. Does sex influence the probability of inheriting a trait?
Ratio
________ = number of one kind of possible outcome/ rest of number of all possible outcomes
If a trait is autosomal (a chromosome that is not X or Y), it will appear in both sexes equally . If a trait is _____________ it is a trait whose allele is located on the X chromosome. Most are recessive, but males only get one X so it will be expressed.
Sex Linked

3. Examples of Sex Linked Traits
Red-green colorblindness
Male pattern Baldness
Hemophilia
Duchenne Muscular Dystrophy
In humans, red-green colorblindness is a recessive sex-linked trait. It is found on the X chromosome, not the Y. Because males only have one X chromosome, they have a much greater chance of having red-green colorblindness. Females would need to be homozygous recessive in order to have red-green colorblindess.

6. What if we wanted to learn about a trait in our own families?
Geneticists often prepare a ____________, a family history that shows how traits are inherited over several generations.
Pedigree

8. Probability Practice Flower Color 705 Purple 224 white Seed color
Contrasting Traits
F2 Generation Results
Ratio
Flower Color
705 Purple
224 white
Seed color
6,022 Yellow
2,001 Green
Seed shape
5,474 Round
1,850 Wrinkled
Pod color
428 Green
152 yellow
Pod shape
822 Round
299 constricted
Flower position
651 axial
207 top
Plant height
787 tall
277 dwarf