1. GENETICS Practice Chapter 11

2. The parents in this cross are _____________ Homozygous Heterozygous Heterozygous If G is dominant for green pods and g is recessive for yellow pods, what percentage of the offspring will have green pods? _______% 75 GGGg gg G g G g

3. Bb B b The genotype of the offspring in the blue box is _______ bb The offspring in the blue box is homozygous heterozygous homozygous

4. Bb B b In guinea pigs black fur (B) is dominant over brown fur (b). The Punnett square for a cross between a HETEROZYGOUS black guinea pig and a PURE brown guinea pig would look like This is the Correct setup Heterozygous = Bb Pure brown = bb BB b b Bb b b Bb B B Another name for pure is _________________ homozygous

5. Ao A AAAo B ABBo F A & B are codominant The alleles for blood type show 2 kinds of inheritance.. The following statements are TRUE or FALSE? A is dominant over B. O is dominant over A. A is dominant over O. B and A are co-dominant A is incompletely dominant over O. O is recessive to A and to B F O is recessive to both A & B T T F T

6. An organism has the genotype Xy. What are the possible sperm it can produce? ______ ______ THINK ABOUT IT: If females have an XX genotype and can only give X genes, which parent is the one that determines whether the baby is a boy or girl? X y Father ; The mother always gives an X If the father gives a y, it’s a boy. If the father gives an X; it’s a girl.

7. If you cross a homozygous RED flowered four o’clock plant with a homozygous WHITE flowered plant, ALL of the offspring produced have PINK flowers. This type of inheritance in which the heterozygote (Rr) shows a blending of traits is called __________. A. Dominant/recessive inheritance B. Co-dominance C. Incomplete dominance Incomplete dominance

8. What are the possible phenotypes of their offspring? (% and color) Red throats (R) are dominant over white (r) throats in Goonie birds. Make a cross between a PURE RECESSIVE and a HETEROZYGOUS Goonie bird. 50% red throats 50% white throats Rr rr R r r

9. What are the possible phenotypes of their offspring? (% and color) Black eyes (B) are dominant over red eyes (b) in rats. Make a cross between two HETEROZYGOUS rats. 75 % black eyes 25% red eyes B b B b BB Bb Bb bb

10. The parents in this cross are _____________ Homozygous Heterozygous Homozygous If W is dominant for long wings and w is recessive for short wings, what percentage of these offspring will have short wings? _______% 0% only ww makes it short

11. Who is the “Father of Genetics”? Gregor Mendel Which of the following genotypes could be from a HETEROZYGOUS organism? TT Rr Ww bb XX Ss Rr Ww Ss

12. What kind of cross is this? Pure dominant X pure recessive Heterozygous X heterozygous Heterozygous X homozygous Hybrid recessive X hybrid pure Heterozygous X Homozygous Another name for heterozygous is _______________ hybrid

13. What is the probability the offspring will have straight tails? In Reebops curly tails (T) are dominant over straight tails (t). Make a cross between a HOMOZYGOUS DOMINANT and a HOMOZYGOUS RECESSIVE Reebop. 0% All will be Curly tailed (Tt) Tt Tt Tt T T t

14. BT bt bT Bt What type of gametes can this organism produce? BbTt ______ ______ _______ _______ What type of gametes can this organism produce? BBTT ______ ______ _______ _______ BT BT

15. TRTrtRtr TR Tr tR tr Tall = T short = t R= round r=wrinkled seeds seeds TtRr X TtRr TTRR TTRr TtRR TtRr TTRr TTrr TtRr Ttrr TtRR TtRr ttRR ttRr TtRr Ttrr ttRr ttrr

16. This is an example of a DIHYBRID cross. Which pattern of phenotypes will be seen in the offspring? 9:3:3:1 How many offspring will be Short AND Round? ______ Short AND wrinkled ? ______ 3/16 Recessive and dominant Recessive and recessive HINT: 9- dominant for both 3- recessive and dominant 3- dominant and recessive 1- recessive and recessive 1/16

17. What do we call the offspring of the F 1 generation? F2F2 Which of the following genotypes could be from a HOMOZYGOUS RECESSIVE organism? TT bbRr Ww tt XX aa bb tt aa

18. Aa A a The genotype of the offspring in the blue box is _______ homozygous heterozygous heterozygous How many of the offspring from this cross will show the dominant characteristic? ¾ (75%) – AA and Aa

19. Gg G GGGg g gg G is dominant for green pods. g is recessive for yellow pods. What is the genotype of the offspring in the shaded box? Gg What is the phenotype of the offspring in the shaded box? Green pods

20. Which of the following is NOT TRUE? Genotype determines phenotype Alleles are different forms of the same gene. Genotype is the way the genes make you look. Organisms with different genotypes can have the same phenotype. T T F T Tt and TT both look tall

21. What are the 3 different kinds of inheritance you learned about? Dominant/recessive Incomplete dominance Co-dominance Offspring of the P 1 generation are called ______ F 1

22. What are the probable blood types of the offspring? What are the possible offspring of a cross between a blood type AB mom and a type O dad? 50% Type A 50% Type B Ao Bo A B O

23. Which of the following crosses would you expect to see a 9:3:3:1 ratio in the offspring? SSYY X ssyy SsYy X SsYy ssYY X SSyy SsYy X SsYy 9:3:3:1 ratio is seen in dihybrid crosses

24. What will the offspring be like? (% and color) Purple (P)is the dominant color for monsters. Yellow is recessive (p). Make a cross between a HOMOZYGOUS purple and a yellow monster. 100% purple Pp P P p

25. What genotype would a PURPLE dad have to be to make a yellow monster baby with a Purple (Pp) mom monster? Pp ? ? pp Pp Dad needs to have: a little p to give one to the baby a big P to be purple himself

26. Wilma and Fred are going to have a baby. Fred in AA and Wilma is oo. What are the possible blood types of their baby? 100% will have A type blood Ao A A o

27. Wilma and Fred are going to have a baby. Fred in AA and Wilma is oo. What are the possible blood types of their baby? 100% will have A type blood Ao A A o

28. RT rt rT Rt What type of gametes can this organism produce? RrTt ______ ______ _______ _______ What type of gametes can this organism produce? WwGg ______ ______ _______ _______ WG wg wG Wg

29. In a DIHYBRID HETEROZYGOUS cross the offspring that are 9/16 are _______________ for both traits. 3/16 are _____________ for one trait and _____________ for the other. 1/16 are _____________ for both traits. Dominant FILL IN THE BLANKS WITH THE WORDS Dominant OR Recessive Dominant Recessive

30. In this cross: TtRr X TtRt What is the probability the offspring will be: Tall AND white? ____/16 Short AND red? ____/16 Tall AND red? ___/16 Short AND white? ___/16 3 T = TallR = red t = shortr = white 3 9 1

31. In this cross: TtYy X TtYy What is the probability the offspring will be: short AND green? ____/16 Short AND yellow? ____/16 Tall AND green? ___/16 tall AND yellow? ___/16 1 T = TallY = yellow peas t = shorty = green peas 3 3 9

32. In this cross: YYRR X yyRR Be careful! What is the probability the offspring will be: Yellow peas AND white flowers? ____/16 Green peas AND red flowers? ____/16 Yellow peas AND red flowers? ___/16 Green peas AND white flowers? ___/16 0 Y = yellow peasR = red flowers y = green peasr = white flowers 0 16 0