1. Genetics Review

2. 1. . This used to determine the probability a trait will be shown
Punnett Square
2. In a one-celled organism the only form of reproduction is
Mitosis

3. Explain your answer to #3
3. A person with the genotype Bb will have what color eyes (Brown is dominant
BROWN
Explain your answer to #3
The dominant trait will always show.

4. 4. The occurrence of an inherited trait that makes an organism different from other members of the same species
Variation
5. An inherited characteristic of an organism, which can be passed from one generation to another
Trait

5. 6. A gene that codes for a certain characteristic only if it is with another recessive gene.
7. Human female chromosomes
8. Human male chromosomes XX XY

6. Incomplete Dominance or blending
9. The offspring will exhibit a trait, which is in between that of the contrasting traits of the purebred parents. THERE IS NO RECESSIVE TRAIT
Incomplete Dominance or blending
10. Traits which are controlled by the genes of the X chromosome. Examples: colorblindness and hemophilia
Sex-Linked

7. 11. I was the 19th century Austrian Monk who is known as the father of genetics
Mendel
12. Give the genotype for a Pure dominant Tall pea plant TT

8. Phenotype Genotype Pedigree Chart
13. A diagram which shows the history of a trait from one generation to another.
Pedigree Chart
14. A characteristic or trait of an organism that is coded for by specific genes Examples: blue eyes or brown eyes; long ears or short ears
Phenotype
15. The genes that code for a certain characteristic or trait (phenotype) Examples: BB, Bb, or bb; AA, Aa, or aa
Genotype

9. heterozygote or hybrid
16. A change in an organisms DNA
Mutation
17. I am a person who will advise couples of how probable it is their children will have an inherited disease
Genetic counselor
18. A female frog has 13 chromosomes in each of her egg cells. How many chromosomes will she have in all the other cells in her body? 26
19. An organism with a genotype Rr is also known as
heterozygote or hybrid

10. Homozygote or pure recessive
20. A diagram which traces the history of a trait from generation to generation
Pedigree chart
21. One gene in a pair of genes that code for the same characteristic.
allele
22. An organism with the genotype tt is also known as
Homozygote or pure recessive
23. The study of how an organism inherits traits
Heredity

11. t t T t Tt Tt tt tt tt Tt 24 a)What is Norman’s genotype?
What is Nancy’s genotype? Tt
25. Draw a punnett square for the cross between Norman and Nancy
t t T t Tt Tt tt tt

12. Tall=50% floppy ears=50% Tt=50% tt=50%
26. What are the possible phenotypes of the cross (please give %)
Tall=50% floppy ears=50%
27. What are the possible genotypes (please give %)
Tt=50% tt=50%

13. 28. Samantha has a few birds, she explains to Haley that these birds exhibit (show) incomplete dominance in inheritance for color. What color would the offspring be of a yellow bird and a blue bird of the same species? Use a punnett square.
Y Y B BY BY BY BY

14. Green = 100% BY= 100% B. . What are the phenotypes for this cross (%)
C. What are the genotypes for this cross (%)
BY= 100%

15. 29. Please draw a Punnett square to show the crossing of the offspring shown in #28.
B Y B Y BB BY BY YY