1. Genetics Review Get your genetics review out
Whiteboards: You will work with your partner to answer each question. You should both answer on your own whiteboard, but you may discuss your answers if needed

2. In roses, red is dominant to yellow
In roses, red is dominant to yellow. Cross a homozygous red rose with a heterozygous red rose

3. Meiosis is important to sexual reproduction because…
Ensures genetic variation!!!

4. Red (RR) is incompletely dominant to white (WW) flowers, their offspring show a 3rd pink (RW) flower color. What is the percent chance that a red flower crossed with a pink flower would produce a white offspring? What is this this type of inheritance? 0%
Incomplete dominance

5. What is the significance of crossing over?
Increases genetic variation!!!

6. Cross a homozygous running, homozygous black mouse with a heterozygous running, brown mouse. KEY: R-running r-waltzing B-black b-brown

7. In cats, long tails are dominant to short tails
In cats, long tails are dominant to short tails. Cross two heterozygous long tailed cats. What percent of the offspring will have short tails?
25%

8. A body cell has 64 chromosomes, how many chromosomes will each gamete cell have after meiosis?32

9. Mr. Jones was taken to court and charged with being the father of a woman’s child. He is homozygous type A blood. She is heterozygous type B blood. The child is type O blood. Is Mr. Jones the father? No

10. Hairy guinea pigs are dominant to hairless
Hairy guinea pigs are dominant to hairless. If a guinea pig is heterozygous hairy, its genotype is - Hh

11. Cross a colorblind man with a Heterozygous normal woman
Cross a colorblind man with a Heterozygous normal woman. What is the percentage of colorblind offspring?
50% will be colorblind (1 female and 1 male)

12. Segregation during meiosis is when chromosomes -
separate leading to less chromosomes per cell

13. A female carrier of hemophilia marries a normal male
A female carrier of hemophilia marries a normal male. What is the percent that their offspring would have hemophilia?
25% will have hemophilia (1 male)

14. What part of DNA is referred to as the genetic code?
Nitrogen bases!!

15. In chickens, black feather color is co-dominant to white feather color and a chicken with both feathers is speckled (showing black & white). Cross two speckled chickens. What percentage of the offspring will have only white feathers?
25%

16. The alleles Bb are known as -
Heterozygous

17. In rabbits, black hair color is dominant to white
In rabbits, black hair color is dominant to white. Cross a heterozygous black rabbit with a white rabbit. What is the percentage of homozygous recessive rabbits?
50% homozygous recessive white

18. The alleles bb are known as -
Homozygous Recessive

19. If a normal woman marries a normal man and two of their three sons are hemophiliacs, what is her genotype? Is this possible?
XHXh
Yes, this is possible because they have a 25% chance of having a son with hemophilia each time they have a child because mom is a carrier.

20. Yellow petals are dominant to orange
Yellow petals are dominant to orange. If a flower is heterozygous, its phenotype is -
Yellow

21. In lizards, green skin color is dominant to purple
In lizards, green skin color is dominant to purple. Cross a heterozygous green lizard with a purple lizard. What is the genotype ratio? What is the percentage for offspring with a heterozygous genotype?
50% Gg

22. The letters C and c represent genes for a certain trait
The letters C and c represent genes for a certain trait. These letters also represent -
Pair of alleles for a trait

23. If red (RR) and blue (BB) flowers are crossed, they produce a 3rd purple (RB) flower. What is the percent chance that two purple flowers would have a red offspring? What is this this type of inheritance?
25%
Incomplete dominance

24. Which type of cells undergo meiosis?
Gametes
Sperm & Egg cells

25. Cross a normal man with a Hemophiliac woman
Cross a normal man with a Hemophiliac woman. What is the percentages of phenotypes for their offspring?
50% carrier female
50% hemophiliac male

26. The genotype refers to the -
alleles of a gene

27. Cross a parent with Type AB blood with a parent that has heterozygous type A blood. What are the genotypes? What is the percentage of type A blood?
AA, AB, AO, BO
50% type A blood

28. Sequence of nitrogen bases!!!
The traits that an organism displays are coded for by what part of the DNA?
Sequence of nitrogen bases!!!

29. In noses, dry nostrils are incompletely dominant to runny nostrils
In noses, dry nostrils are incompletely dominant to runny nostrils. A cross will result in a slimy nostril. Cross two slimy nostrils. What is the genotypic ratio? What is the percentage of slimy nostrils?
1 DD: 2 DR: 1 RR
50% slimy nostrils

30. Cross a heterozygous running, heterozygous black mouse with a heterozygous running, heterozygous black mouse. What is the phenotypic ratio? KEY: R-running r-waltzing B-black b-brown
9:3:3:1
Dominant-dominant
Dominant-recessive
Recessive-dominant
Recessive-recessive