HW: Study Guide & Test Friday Wednesday April 26, 2017 I can: review concepts of genetics and Punnett Squares Agenda (10) Catalyst (15) Review: Punnett Squares (30) My Favorite NO (15) Kahoot! (15) Study Guide Catalyst How can twins with identical DNA look/behave differently? Identify the technology: Separates strands of DNA by size to create a fingerprint Makes identical copies of an organism Organisms with DNA from different species Undifferentiated cells HW: Study Guide & Test Friday Unit 4 Packet due Monday

How to complete a Punnett Square: The allele combinations that might result from a cross can be determined by drawing a Punnett Square. father = Bb, mother = bb How to complete a Punnett Square: B b 1. Draw the Punnett Square. 2. Place the father's alleles on the top of the Punnett square, one letter per box. B b b b b 3. Place the mother's alleles on the left side of the square, one letter per box. B b b b b 4. Drop the father's alleles down into the squares and bring the mother's across. Now you have all possible allele combinations for the offspring.

Question 1 A man with type AB blood marries a woman with type O blood. What percent of their children will have type A blood? Type of inheritance? Alleles? Parental genotypes? Answer to question? Co-dominance IA = type A IB = type B i = type O IA IB IAi IBi i IAIB x ii IAi IBi i 50% type A blood

Question 2 Snapdragons can be red, white or pink. If a red snapdragon is crossed with a white snapdragon, what percent of the offspring will be pink? Type of inheritance? Alleles? Parental genotypes? Answer to question? Incomplete R = red W = white R R RW RW W RR x WW RW RW 100% pink W

Question 3 Hemophilia (h) is a recessive genetic disorder carried on the X chromosome. If a man with hemophilia marries a woman who is a carrier, what percent of their daughters will have hemophilia? Type of inheritance? Alleles? Parental genotypes? Answer to question? Sex-linked XH = no hemophilia Xh = hemophilia Xh Y XHXh XHY XH XhY x XHXh XhXh XhY Xh 50% daughter with hemophilia

Question 4 Green seeds (G) are dominant to yellow seeds (g) in peas. If a homozygous dominant plant is crossed with a plant with yellow seeds, what percent of the offspring will have yellow seeds? Type of inheritance? Alleles? Parental genotypes? Answer to question? Complete G = green g = yellow G G Gg Gg g GG x gg Gg Gg 0% yellow g

My Favorite NO This protocol is designed to allow us to learn together from our mistakes. For each question displayed on the screen, you will write down on an index card: what you know (alleles, parental genotype, Punnett Square) what that implies about the correct answer letter of the correct answer with a box around it your name on the back of the card After 2 minutes for each question, pass your cards to the person at the end of your row. Someone will come and collect the cards.

Question 1 A cleft chin in humans is coded by the dominant allele C. A chin without a cleft is coded by the recessive allele c. A man with a cc allele combination for the trait produces a zygote with a woman with a Cc allele combination for the trait. Which allele combinations could occur in the zygote? Cc or cc CC o rCc CC only Cc only End

Question 2 Two parents have blood type A, and they are both heterozygous for this trait. What is the chance they will have a child with a homozygous genotype? 0% 25% 50% 75% End

Question 3 A daughter has hemophilia, a recessive sex-linked trait. Which are possible genotypes of her parents? XHXh and XhY XHXH and XhY XhXh and XHY XHXh and XHY End

Question 4 A woman with blue eyes has a brown ­eyed son. He marries a woman with blue eyes. What is the probability that they will have a a blue ­eyed child? 0 in 4 1 in 4 1 in 2 3 in 4 End