1. “Frozen” HW check Have your homework out so we can check it.

2. Walk around review: Journals: Page:_____ Title: Genetics Review
EQ: How can the outcome of genetic combinations be predicted?

3. Crossing over creates gametes that are unique
Causes increased genetic diversity in a population
Used to grow and repair an organism
Decreases the occurrence of mutations
Creates identical cells
Creates gametes that have half the number of chromosomes as the parent cell

4. Crossing over creates gametes that are unique
Causes increased genetic diversity in a population
Used to grow and repair an organism
Decreases the occurrence of mutations
Creates identical cells
Creates gametes that have half the number of chromosomes as the parent cell

5. Which of the following are examples of phenotypes?
Brown hair BB Bb
Blue eyes
Physical characteristics
Genetic characteristics
Bbyy
Hitchhiker’s thumb
Which of the following are examples of phenotypes?

6. Which of the following are examples of phenotypes?
Brown hair BB Bb
Blue eyes
Physical characteristics
Genetic characteristics
Bbyy
Hitchhiker’s thumb

7. Which of the following are examples of genotypes?
Black hair Ss AA
green eyes
Physical characteristics
Genetic characteristics
Bbyy
snoring
Which of the following are examples of genotypes?

8. Which of the following are examples of genotypes?
Black hair Ss AA
green eyes
Physical characteristics
Genetic characteristics
Bbyy
snoring

9. If red flowers (R) are dominant to white flowers, then what are the possible alleles for red flowers?

10. If red flowers are dominant to white flowers, then what are the possible genotypes for red flowers? RR, Rr

11. Red flowers (R) are dominant to white flowers
Red flowers (R) are dominant to white flowers. What would the genotype for a heterozygous plant be?

12. Red flowers (R) are dominant to white flowers
Red flowers (R) are dominant to white flowers. What would the allele for a heterozygous plant be? Rr

13. Having a hitchhiker's thumb (H) is a dominant trait
Having a hitchhiker's thumb (H) is a dominant trait. If a woman with a straight thumb has a child with a man who is heterozygous for the trait, what are the chances their child will have a hitchhiker's thumb?

14. 6-7. Having a hitchhiker's thumb (H) is a dominant trait
6-7. Having a hitchhiker's thumb (H) is a dominant trait. If a woman with a straight thumb has a child with a man who is heterozygous for the trait, what are the chances their child will have a hitchhiker's thumb?
H h Hh hh
h h
50% chance

15. Straight hair (S) is dominant to curly hair (s)
Straight hair (S) is dominant to curly hair (s). What would be the phenotypic ratio for a child if both parents are heterozygous dominant?

16. SS Ss ss 3 straight hair: 1 curly hair S s s S
Straight hair (S) is dominant to curly hair (s). What would be the phenotypic ratio for a child if both parents are heterozygous dominant?
S s SS Ss ss
s S
3 straight hair: 1 curly hair

17. Straight hair (S) is dominant to curly hair (s)
Straight hair (S) is dominant to curly hair (s). What would be the genotypic ratio for a child if both parents are heterozygous dominant?

18. 8. Straight hair (S) is dominant to curly hair (s)
8. Straight hair (S) is dominant to curly hair (s). What would be the genotypic ratio for a child if both parents are heterozygous dominant?
S s SS Ss ss
s S
1 SS: 2 Ss: 1 ss

19. What percent of offspring would have white flowers in a cross between pink flower (PP) and a white flower (pp)?

20. What percent of offspring would have white flowers in a cross between pink flower (PP) and a white flower (pp)?
P P Pp
p p
0 % would be white

21. Why is it possible for one kid to look like their mom, but their sister to look like their dad?

22. Each kid inherits a different combination of chromosomes from their parents

23. Long fingers are dominant (F) to short fingers (f)
Long fingers are dominant (F) to short fingers (f). Complete the Punnett square for a homozygous recessive mom and a heterozygous dad. What are the chances that their child will have short fingers?

24. Ff ff 50% would be short fingers
Long fingers are dominant (F) to short fingers (f). Complete the Punnett square for a homozygous recessive mom and a heterozygous dad. What are the chances that their child will have short fingers?
F f Ff ff
f f
50% would be short fingers

25. Pink petals are dominant (P) to white petals (p) and long stems (L) are dominant to short stems (l). If two heterozygous plants are crossed, what would be the chance they’d produce a pink, short stemmed plant?

26. ¾ x ¼ = 3/16 L l P p L P PP Pp LL Ll Ll ll p Pp l pp
Pink petals are dominant (P) to white petals (p) and long stems (L) are dominant to short stems (l). If two heterozygous plants are crossed, what would be the chance they’d produce a pink, short stemmed plant?
¾ x ¼ = 3/16 L l P p L P PP Pp LL Ll Ll ll p Pp l pp

27. Yellow eyes are dominant to green eyes in cats
Yellow eyes are dominant to green eyes in cats. A homozygous yellow eyed cat is crossed with a homozygous green eyed cat. What do you predict will be the outcome of this genetic cross?

28. Yellow eyes (e+) are dominant to green eyes (e) in cats
Yellow eyes (e+) are dominant to green eyes (e) in cats. A homozygous yellow eyed cat (e+e+) is crossed with a homozygous green eyed cat (ee). What do you predict will be the outcome of this genetic cross? e+ e+
All the offspring will be yellow eyed (heterozygous) e e+ e e+ e e e+ e e+ e

29. Pink petals are dominant (P) to white petals (p) and long stems (L) are dominant to short stems (l). What percentage of the offspring from a PpLl x ppll cross would be homozygous recessive?

30. ½ x ½ = ¼ or 25% L l P p l p Pp pp Ll ll Ll ll p Pp l pp
Pink petals are dominant (P) to white petals (p) and long stems (L) are dominant to short stems (l). What percentage of the offspring from a PpLl x ppll cross would be homozygous recessive?
½ x ½ = ¼ or 25% L l P p l p Pp pp Ll ll Ll ll p Pp l pp

31. Examine the Punnett squares above
Examine the Punnett squares above. Based on the offspring, determine the genotypes of the parents for each Punnett Square.

32. Rr X Rr
YY X YY
Examine the Punnett squares above. Based on the offspring, determine the genotypes of the parents for each Punnett Square.

34. 1 RR : 2 Rr : 1 rr
4 YY : 0 Yy : 0 yy
4 Yellow : 0 brown
3 Red : 1 pink

35. Examine the Punnett squares above
Examine the Punnett squares above. Based on the offspring, determine the genotypes of the parents for each Punnett Square.

36. rr x rr
SS x Ss
Examine the Punnett squares above. Based on the offspring, determine the genotypes of the parents for each Punnett Square.

38. 0 RR : 0 Rr : 4 rr
0 RR : 0 Rr : 4 rr
0 Round : 4 Oval

39. Full Class Taboo Time

40. Heterozygous

41. Homozygous dominant

42. Allele

43. Hybrid

44. Genotype

45. Phenotype

46. Trait

47. Purebred

48. Gene

49. Dominant

50. Recessive

51. Hybrid

52. Mitosis

53. Meiosis