Standard 1B: Genetics Ms. Darlak Biology B Week 3 Standard 1B: Genetics Ms. Darlak

Warm-up 12/19 WW ww Ww ww Ww ww ww Ww ww Ww Ww Ww What is the genotype for individual #12, if individual #1 is WW. Is this showing a dominant or recessive trait?

Agenda 12/19 Questions? Standard 1B 2B Clicker Pretest

Warm-up 12/15 Does the following pedigree show a dominant or recessive trait? How do you know? Is the trait carried on an autosomal or sex chromosome?

Warm-up 12/15 Recessive Sex-chromosome Who are carriers, give to sons only?

Agenda 12/15 Quiz II Multiple Alleles & Sex linked traits Thacker Family Pedigree pp. 22-24 Mixed Genetics Review p.25 Due Wednesday STANDARD 1B FRIDAY!

Thacker Family Pedigree Some people are born with extra fingers or toes. This condition, known as polydactyly, is rare. Family Story pps. 22-23 Construct a Pedigree for whole family on p.24 Include Names Genotypes 7 7 7

Classwork/Homework Thacker Family Pedigree pp.22-24 Mixed Genetics Review p.25 On separate piece of paper. SHOW ALL WORK!

Bio Warm-up 12/16 In northeast Kansas there is a creature known as a wildcat. It comes in three colors, blue, red, and purple. A homozygous individual is blue, a homozygous individual is red, and a heterozygous individual is purple. What would the genotypes and phenotypes of the offspring be if a blue wildcat was crossed with a red one? What Mode of Inheritance is this?  

Answer: R BR B= Blue, R= Red, BR= Purple BB (blue) x RR (red). Genotypes: 100% BR Phenotypes: 100% Purple Incomplete Dominance, two phenotypes produce a BLEND or intermediate. (remember white + red = pink)

Agenda 12/16 Quiz Pass Back Thacker Family Pedigree Check Mixed Genetics Review p. 25 DUE 12/17 On separate piece of paper. SHOW ALL WORK! Standard Questions Review (GROUP) Due Thursday Pedigree Quiz Wednesday STANDARD 1B FRIDAY!

Most common missed question. 50% Female carrier 50% Female no trait 50% Male has trait 50% Male no trait 25% Offspring Have trait

Warm-up 12/17 Draw a pedigree to depict the following family: One couple has a son and a daughter with normal pigmentation. Another couple has one son and two daughters with normal pigmentation. The daughter from the first couple has three children with the son of the second couple. Their son and one daughter have albinism; their other daughter has normal pigmentation.

Answer

Agenda 12/17 Thacker Family Check Pedigree Quiz Mixed Genetics Problems Due Standard Questions Review Due Thursday Tomorrow! 1B Review Chart STANDARD 1B FRIDAY!

Thacker Family Pedigree p. 24 Zz zz Zz zz Zz zz zz zz zz Zz Zz zz zz Zz zz zz zz zz zz zz zz Zz Zz Polydactyl = Z Dominant Trait

Mixed Genetics Problems Answer Key on Class Website

Group Review Define the terms homozygous and heterozygous. Give examples. What are dominant and recessive alleles? Give examples. Define the terms genotype and phenotype. Give examples. Describe four inheritance patterns besides simple dominance. Give an explanation of each. Create a visual example for each. What is the difference between incomplete dominance and codominance? Give a visual example to show the difference. Construct 5 genetics problems, one for each of the five modes of inheritance. For each question, create a scenario describing the phenotypes of the individuals, or other required information to compete the problem. Ask a specific question in each problem. Your problem must have an answer key that includes all work. Punnett square, genotypic and phenotypic ratios. Create a recessive or dominant pedigree, with at least 10 individuals; this will be the answer key. Give verbal information for all of the individuals, so that a classmate could construct the same pedigree that you made.

Warm-up 12/18 A human female "carrier" who is heterozygous for the recessive, sex-linked trait causing red-green color blindness marries a male who is not colorblind. What proportion of their male progeny will have red-green color blindness?

Sex-linked Answer: XN Y XNXN XNY Xn XNXn XnY XN XN – normal Xn – colorblind Male = XNY Female = XNXn Genotypes: 25% XNY 25% XnY 25% XNXn 25% XNXN Phenotypes: MALES: 50% normal, 50% colorblind FEMALES: 100% normal Answer: 50% of males will be colorblind XN Y XN Xn XNXN XNY XNXn XnY

Agenda 12/18 Standard Questions Review (Group) Due Today 1B Review Chart see p. 26 STANDARD 1B TOMORROW!

Standard 1B Review Look over 3 quizzes (3 Modes, Sex-linked & Multi-Alleles, Pedigree) What did you get wrong? Do you understand why it was wrong? Do you need it explained again? Mixed Genetics Problems p.25 (Many have not done) #1-11 to meet standard (3) #12-15 to exceed standard (4 or 5) Create Questions with answer sheet (use p. 26 to help) Exchange questions with another person/group. Check your answers with their answer sheet. Does question make sense? Does answer make sense? What is the mode of inheritance?

Genetics Bingo PEDIGREE PUNNETT SQUARE AUTOSOME SEX-CHROMOSOME 22 PAIR IA i IB i IA IA IA IB ii IA IB x IB IB IA IB x IB i XhXh x XHY RW x RW ALLELE GENOTYPE PHENOTYPE INCOMPLETE DOMINANCE CODOMINANCE SEX-LINKED MULTI-ALLELIC SIMPLE DOMINANCE MENDEL RR RW RB BB WW TT Tt tt HOMOZYGOUS HETEROZYGOUS HOMOZYGOUS RECESSIVE HOMOZYGOUS DOMINANT 0% 25% 50% 75% 100%