AP Biology Discussion Notes Monday 3/23/2015

Goals for the day Be able to predict patterns of inheritance and interpret pedigrees. Be able to use probabilities to predict the likelihood of different outcomes

Question of the day 3/23/14 What steps would you take to figure out what kind of trait is represented by a pedigree?

Steps in interpreting a pedigree – Determine if trait is dominant or recessive and use specific individuals to explain your answer. – Next decide if a trait is Autosomal or sex-linked Ask yourself the questions, and if that doesn’t help start writing out genotypes and see if you encounter any problems. – Fill in Genotypes for all individuals (leaving “?” where you cannot be 100% certain)

Science Fair Judging? Oscar Howe Elementary K-5 kids March 24 th – (Tuesday -TOMORROW) – 6:15 to 7:30pm Have a check sheet (scale of 1-5) talk to each child for ~2 minutes (in pairs) Need about 10 judges Volunteer hours – will provide letter if requested.

Pedigree & Probability Practice

1.If I-2 is a heterozygote for this autosomal trait, what is the probability that she would pass on the recessive allele, “a”, to her children?

2. If I-3 is a heterozygote, a fact we can’t be sure of, what was the probability of him giving the “A” allele to ALL 3 of his children? A. Write this question out in words (using AND /OR) then show your work to solve the problem.

3. What is the probability that III-6 AND III-8 are both homozygous dominant?

4. What is the probability that III-6 AND III-8 are both heterozygous?

5. Are the probability in #3 and #4 the same? Why or why not?

6. What is the probability that either III-6 or III- 8 is a heterozygote?

Wait. Is that right?

Work Order 1.Pedigree & Probabilities – Determine if trait is dominant or recessive and use specific individuals to explain your answer. – Next decide if a trait is Autosomal or sex-linked Ask yourself the questions, and if that doesn’t help start writing out genotypes and see if you encounter any problems. – Fill in Genotypes for all individuals (leaving “?” where you cannot be 100% certain) 2.Check Pedigree sheet & explanations 3.Bring up book & character map (if you didn’t Friday) 4.Check Problem set 1 (Key online) 5.Sex-linked trait practice problem – Check with Ms. Jacobs

Science Fair Judging? Oscar Howe Elementary K-5 kids March 24 th – (Tuesday -TOMORROW) – 6:15 to 7:30pm Have a check sheet (scale of 1-5) talk to each child for ~2 minutes (in pairs) Need about 10 judges Volunteer hours – will provide letter if requested.

Quiz Friday Genetics Problems, Pedigrees, & Probability

March The Geese Return

Species of the Day 3/23 Snow Goose (Blue Goose) -Chen caerulescens

Species of the Day 3/23 Snow Goose (Blue Goose) -Chen caerulescens

March The Geese Return 5 Different species of geese in South Dakota Snow Goose

Species of the Day 3/23 Snow Goose (Blue Goose) -Chen caerulescens