Name:
Pd:
Biology 11.1/11.2 Review
11.1
1. Define genetics:
study of heredity
2. The process by which male and female reproductive cells join to produce a new cell
is called
fertilization
.
3. If a plant is true-breeding, how do the parents and offspring compare?
They are identical
4. If a tall plant has all tall offspring, is it true-breeding? Yes
If a tall plant has all short offspring, is it true-breeding?
No
If a tall plant has both tall and short offspring, is it true-breeding?
5. Hybrids are offspring of parents with
different
6. Which generation comes before the F1 generation? P
7. What do you need to express a dominant trait?
At least one dominant allele
8. What do you need to express a recessive trait?
No dominant alleles
9. Each trait is determined by how many alleles?
10. When do alleles segregate, or separate?
During formation of gametes.
2
No
traits.
After F1?
F2
Name:
Pd:
11.2
11. Fill in the table with the missing information.
Genotype
Name of genotype
TT
Homo. dom
Dom or Rec Trait
Expressed
Dominant
Tt
Heterozygous
Dominant
tt
Homo. rec
Recessive
12. What is genotype? Give three examples.
 Combination of alleles for a
certain trait
 Example: Tt, TT, tt
13. What is phenotype? Give three examples?
 How it physically looks
 Example: tall, short, black, white, etc.
14. If blue is dominant (B) and red is recessive (b), what genotype will the narwhal have?
A. Heterozygous
C. Homozygous blue
Bb
B. Red
BB
E. If the narwhal is red, what genotype will it have?
bb
D. Homozygous red
bb
F. If the narwhal is blue, what are the two genotypes it could have?
BB, Bb
bb