Unit 6 Test Review Sheet
1. Define hybrid.
2. Define genes.
3. How did Gregor Mendel say that traits are inherited?
4. When Gregor Mendel crossed a tall plant with a short plant, what did the F1 plants inherit?
5. Define the principle of dominance.
6. Define true-breeds.
7. Why would all of the offspring be tall if a true-breeding tall plant is crossed with a true-breeding short plant?
8. If a tall plant and a short plant are crossed, in what generation can the short plants begin to reappear? Why?
9. What are your chances of flipping a coin and it landing on tails?
10. What can the principles of probability be used to do?
11. Define homozygous and heterozygous.
12. If T is the allele for tallness and t is the allele for shortness, what would the following plant look like: Tt?
13. True or False. A Punnett square can show what the offspring actually look like.
14. How many different allele combinations would be found in the gametes produced by a pea plant whose
genotype was TtRR?
15. If a heterozygous round, heterozygous yellow pea plant is crossed with a homozygous round, heterozygous
yellow pea plant, how many different phenotypes are their offspring expected to show?
16. Define incomplete dominance.
17. Define codominance.
18. Define and give an example of a polygenic trait.
19. Define segregation.
20. How many recessive alleles for a trait must an organism inherit in order to exhibit that trait?
21.
A) Identify the genotype of the
offspring that would be represented
by the question mark.
?
B) Identify the phenotype.
C) List all possible phenotypes.
D) What are the genotypes of the offspring that are green with rough peas?
E) Which fraction of the offspring would be expected to have yellow rough peas?
22. A) What is the genotype of the pink-flowers?
B) What are these alleles showing?
C) When a white and red flower are crossed,
what percentage of their offspring would be pink?
D) If two pink flowers are crossed, what
percentage of their offspring would be pink?