Download Ch 9.1 and 2 SR

Sci 7 Ch 9.1 Section Review
1. Give three reasons why Mendel chose pea plants for his experiments with traits.
a. ___________________________________________________________________
b. ___________________________________________________________________
c. ___________________________________________________________________
2. Name two ways pollination can occur.
a. ___________________________________________________________________
b. ___________________________________________________________________
3. What is a true-breeding plant? _______________________________________________
_____________________________________________________________________
4. What happened when Mendel crossed a true-breeding, green seeded plant with a truebreeding, yellow-seeded plant? ___________________________________________
_____________________________________________________________________
5. What is the best way to determine the phenotype of a bird’s feathers?
a. analyze the bird’s genes
c. look at the bird’s offspring
b. look at the bird’s feathers
d. look at the bird’s parents
6. Which statement best describes how to write the genotype for a trait?
a. A capital letter represents the dominant allele and a different capital letter
represents the recessive allele.
b. A capital letter represents the dominant allele and a different lowercase letter
represents the recessive allele.
c. A capital letter represents the dominant allele and the lower case of that letter
represents the recessive allele.
7. Write all of the possible genotypes for each pea plant:
a. A plant with purple flowers. ___________
b. A plant with round seeds. ___________
c. A plant with green seeds. ____________
d. A plant with yellow pods .____________
7Ch9SR 1
Sci 7 Ch 9.2 Section Review
1. Explain the relationship between each pair of terms:
gene and chromosome _________________________________________________
gene and DNA _______________________________________________________
gene and allele _______________________________________________________
allele and meiosis _____________________________________________________
2. The table below summarizes four traits in humans. Use the information to answer
questions a through d.
Trait
Dominant allele
Recessive allele
Earlobes
Free (F)
Attached (f)
Chin
Cleft (C)
No cleft (c)
Thumb
Straight (S)
Hitch hiker’s (s)
a. What is the phenotype of a person with a genotype of Cc? ______________________
b. What are the possible genotypes of a person with a straight thumb? ______________
c. A man with a genotype of FF marries a woman with a genotype of ff. What are the
possible genotypes and phenotypes of their offspring?
Genotypes:_______________________________________________________
Phenotypes: ______________________________________________________
d. A woman with a genotype of Cc marries a man with a genotype of Cc.
What is the probability that their offspring will have a chin with no
cleft?
C
Cleft chin: ____________________________
C
c
Ff
ff
Ff
ff
c
No Cleft: _____________________________
3. Use the Punnett square to the right to answer the following questions:
a. What are the genotypes of the parents? _____________________
b. What are the phenotypes of the parents?____________________
______________________________________________________
c. What is the probability that their offspring will have free-earlobes?
_____________________________________________________
d. What is the probability that their offspring will have attached earlobes?
_______________________________________________________
7Ch9SR 2