1. Punnett squares Practice

2. The tool which uses the combination of alleles to predict the probability of traits showing up in offspring.

3. Green eyes are dominant and yellow eyes are recessive. The genotype of two insects are Gg and Gg. Complete a Punnett square!

4. G Gg Gg GG g G g ?? ?? = gg

5. What % of the young would have green eyes? Yellow eyes? 75% 25%

6. If B=black and b=brown and two wolves are heterozygous Bb and homozygous bb what would their young be? Complete a Punnett square!

7. B Bb bb Bb b b b bb

8. What % of young would be black and what % would be brown? Black = 50 % Brown = 50 %

9. B=Brown eyes which are dominant, b=blue eyes which are recessive What are the alleles of the parents for the following chart?

10. B Bb Bb BB b B b bb

11. The parents would be Bb and Bb and both would have brown eyes!

12. Curly hair is dominant, and a couple have curly hair. How many of their babies will have curly hair?

13. A. All of the babies B. Probably most of the babies C. None of the babies Answer - B

14. What percent of your genes come from each parent? 50%

15. What % of genes come from each grandparent? 25%

16. If green snake skin is dominant and yellow is recessive, what are the alleles of the parent snakes for the following:

17. G Gg Gg Gg g g G Gg

18. Homozygous (GG) green Homozygous (gg) yellow

19. How many different Punnett squares can you think of?

20. In humans, having bushy eyebrows is a trait that is dominant over having thin eyebrows. Two parents with bushy eyebrows are going to have a baby. What can be predicted about how the baby's eyebrows will develop? –The baby definitely will have bushy eyebrows. –The baby most likely will have bushy eyebrows. –The baby will not have bushy eyebrows. –There is not enough information given.

21. Joey has blue eyes, while Diane has brown eyes. What causes them to have different eye colors? –They have different chromosomes for the two eye colors. –Joey has a different number of chromosomes than Diane. –They have different combinations of the genes for eye color. –Joey's mother must have had blue eyes, because you only get blue eyes from your mother.

22. In pea plants, purple flowers are dominant to white flowers. Suppose a purple-flowered plant with genotype Pp is crossed with another purple-flowered plant with the same Pp genotype. What percentage of offspring will also have purple flowers? –25% –50% –75% –100%

23. If big ears are dominant and both parents are homozygous dominant, what percent of babies will have big ears?

24. E EE EE EE E E E EE

25. 100%

26. Three fingers is dominant and five fingers recessive. If mom is homozygous dominant and dad is heterozygous, what percent of young will have three fingers?

27. F Ff FF FF f F F Ff

28. 100%

29. Big noses are dominant and little noses are recessive. If Dad is homozygous dominant and mom is homozygous recessive, what percent of children will have big honkers?

30. N Nn Nn Nn n n N Nn

31. 100%

32. Short is dominant and tall is recessive. If dad is heterozygous and mom is homozygous recessive, what percent of the children will be short and tall?

33. S Ss’ s’s’ Ss’ s’ s’s’

34. 50% short 50% tall

35. Long neck is dominant and short neck is recessive. If dad is heterozygous and mom is heterozygous, what percent of the children will have long necks and short necks?

36. N Nn Nn NN n N n nn

37. 75% Long 25% Short

38. Short tongues are dominant and long are recessive. If mom is homozygous recessive and dad is homozygous recessive, what percent of the children will have long tongues?

39. t tt tt tt t t t tt

40. 100%

41. Thank you