Punnett Squares and Heredity

1. Punnett Squares and Heredity

2. Heredity

3. Topic 1: 200 • Question: • Who is considered the Father of Modern Genetics? • Answer • Gregor Mendel Back

4. Topic 1: 400 • Question: • What plant did the Father of Modern Genetics spend years studying? • Answer • Pea Plant! Back

5. Topic 1: 600 • Question: • Some traits are masked by other traits, what are these masked traits called? • Answer • Recessive traits Back

6. Topic 1: 800 • Question: • Draw and label a recessive male marrying a hetero female – they have 3 kids – determine their genotypes as well • Answer • Pedigree answer Back

7. Topic 1: 1000 • Question: • Normal parents, whose daughter has the recessive trait also have a son who doesn’t carry the gene – draw a pedigree of this and label to show how it is possible • Answer Back

8. Topic 2: 200 • Question: • Any characteristic that can be passed from parents to offspring • Answer • Trait Back

9. Topic 2: 400 • Question: • What is heredity? • Answer • The passing of traits from parents to offspring Back

10. Topic 2: 600 • Question: • The alleles present in the organism, i.e., BB, Bb, or bb • Answer • Genotype Back

11. Topic 2: 800 • Question: • Which is a description of the phenotype? • 2 girls with Bb • Brown hair • Answer • Brown hair Back

12. Topic 2: 1000 • Question: • What are the genetic terms for genotypes with 2 of the same alleles and 2 different alleles? Give an example of each • Answer • Homozygous/purebred (HH/hh) • Heterozygous/carrier/hybrid (Hh) Back

13. Topic 3: 200 • Question: • A way to figure out and organize the possible offspring genotypes is… • Answer • Punnett Square Back

14. Topic 3: 400 • Question: • A heterozygous blue unicow mates with a homozygous purple unicow, list the possible offspring genotypes: • Answer • 2 Bb – blue • 2 bb - purple Back

15. Topic 3: 600 • Question: • S – slimy skin s- rough skin • Gary the Snail is hybrid and his mate is pure slimy. What are the chances their baby snail will have beautiful slimy skin? • Answer • 100% Back

16. Topic 3: 800 • Question: • Bobert has brown eyes, dominant to blue eyes. Boberta has blue eyes. How could they have a child who is homozygous rec? • Answer • Bobert is Bb and only then it is a 50% chance Back

17. Topic 3: 1000 • Question: • A red allele is dominant to a white allele. Two flowers containing these alleles were crossed and produced only red flowers. What are the possible parent genotypes? – (you must list them all for full credit) • Answer • RRxRR – RRxRr - RRxrr Back

18. Topic 4: 200 • Question: • What are the male and female sex chromosomes? • Answer • Female – XX • Male - XY Back

19. Topic 4: 400 • Question: • Why are males more likely than females to inherit sex-linked traits? • Answer • Males only need 1 copy of the recessive X – females need 2 Back

20. Topic 4: 600 • Question: • Which sex can be carriers on sex-linked traits? Why? Do they show the trait? • Answer • Females bc they have 2 X which means 2 alleles, 1 can be recessive, 1 dominant – which means they would not show the trait Back

21. Topic 4: 800 • Question: • Mom is a carrier and dad has disorder D – a sex-linked recessive disorder. They have a son, what chance does he have of having disorder D? They are expecting their second baby, they do not know the babies sex - what is the chance they will have a baby girl who also has disorder D? • Answer • 50% and 25% Back

22. Topic 4: 1000 • Question: • A colorblind man marries a woman who has normal vision, but her father was colorblind. What is the chance that their child will be colorblind? • Answer • 50% Back

23. Topic 5: 200 • Question: • Why are some traits considered ‘incompletely dominant’? What happens with the phenotype when a hybrid is formed from incomplete dominance • Answer • Some alleles are both equally strong, the resulting hybrid phenotype is a blend of the two alleles Back

24. Topic 5: 400 • Question: • Ms. Post wants to breed her favorite pet cow. She really loves cow and researched how they inherit their cute spotted color, she found it is incomplete dominance between black and white genes. Her cow is heterozygous spotted, her new male bull is dominant black. What chance do the offspring have of being spotted? • Answer • 50% Back

25. Topic 5: 600 • Question: • Prince Charming has straight hair, his Princess Charmina has gorgeous curly hair. The couple thinks a baby a with wavy hair would be an adorable mix of their traits in what situation would this be possible? • Answer • If hair texture is an incomplete dominant trait and heterozygous is the wavy hair trait Back

26. Topic 5: 800 • Question: • Henry the Hippo has heterozygous medium length legs. He wants his kids to have dominant long legs, NOT dominant short legs so they can be the first hippo track stars. Who will Henry have to marry to have at least a 50% chance of long legs? At least 25% chance? • Answer • A dominant long or another hybrid medium Back

27. Topic 5: 1000 • Question: • Draw a pedigree showing a family where neither parent has a recessive autosomal disorder, but they have one male child who does and one female child who does not – give known genotypes • Answer • Parents are heterozygous, male is homozygous recessive, female is either homozygous domor hetero Back

28. Bonus Question: 5000 pts. • Question: • In birds, the sex chromosomes are Z and W. Females are ZW and males are ZZ. • Male chicken has barred (dominant) feathers, sex-linked on the Z – A female has non-barred feathers. What are the possible genotypes of this cross? • Explain whether or not male birds are more likely to have sex linked traits. • Answer • 2 carrier males ZBZb:2 barred females ZBW • Opposite of humans – female birds more likely Back

29. Daily Double The Winner Of The Last Round Write Down How Much Money You Are Willing To Risk If You get the Question write you win that money If you get it wrong you Loss the money!

30. Daily Double The Winner Of The Last Round Write Down How Much Money You Are Willing To Risk If You get the Question write you win that money If you get it wrong you Loss the money!