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HW # 70- Read p. 201 in your book (figure 10) View ppt at home

Week 21, Day Three. HW # 70- Read p. 201 in your book (figure 10) View ppt at home Watch Video Warm up What are two questions that you still have about Punnett squares and/or heredity ? HW TOCs will be collect next Friday. Warm up Response. x.

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HW # 70- Read p. 201 in your book (figure 10) View ppt at home

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  1. Week 21, Day Three HW # 70- Read p. 201 in your book (figure 10) View ppt at home Watch Video Warm up What are two questions that you still have about Punnett squares and/or heredity? HW TOCs will be collect next Friday.

  2. Warm up Response x

  3. Homework Response/Check Unimonster Share Out

  4. Goals for Today • Inherited Human Traits • (Baby Lab) • Watch the video

  5. Pedigrees • Graphic representation of how a trait is passed from parents to offspring • Tips for making a pedigree • Circles are for females • Squares are for males • Horizontal lines connecting a male and a female represent a marriage • Vertical line and brackets connect parent to offspring • A shaded circle or square indicates a person has the trait • A circle or square NOT shaded represents an individual who does NOT have the trait • Partial shade indicates a carrier – someone who is heterozygous for the trait

  6. Example: Make a pedigree chart for the following couple. Dana is color blind; her husband Jeff is not. They have two boys and two girls. HINT: Colorblindness is a recessive sex-linked trait. • XnXn XNY Has trait Can pass trait to offspring

  7. Crossing involving 2 traits – Dihybrid crosses • Example: In rabbits black coat (B) is dominant over brown (b) andstraight hair (H) is dominant to curly (h). Cross 2 hybridrabbits and give the phenotypic ratio for the firstgeneration of offspring. BH Bh bH bh BH Bh bH bh Possible gametes: • BbHh X BbHh BH BH BhBh bHbH bhbh Gametes Phenotypes - 9:3:3:1 9 black and straight 3 black and curly 3 brown and straight 1 brown and curly

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