Vocabulary Quiz for Genetics DO NOT WRITE ON THIS TEST. PLACE ANSWERS ON THE
ANSWER SHEET PROVIDED
Read the questions carefully and choose the best answer that best fits the word or group of words.
1.What is a trait?
a. any characteristic that can be passed from parent to offspring
b. passing of traits from parent to offspring
c. study of heredity
2. What is heredity?
a. any characteristic that can be passed from parent to offspring
b. passing of traits from parent to offspring
c. study of heredity
3. What is genetics?
a. any characteristic that can be passed from parent to offspring
b. passing of traits from parent to offspring
c. study of heredity
4. What is a monohybrid cross?
a. cross involving a single trait
b. cross involving two traits
c. two forms of a gene (dominant & recessive)
5. What is a dihybrid cross?
a. cross involving a single trait
b. cross involving two traits
c. two forms of a gene (dominant & recessive)
6. An alleles is ___________
a. cross involving a single trait
b. cross involving two traits
c. two forms of a gene (do
minant & recessive)
7. Which answer choice best describes the term dominant?
=
b. shows up less often in a cross; represented by a lowercase letter (r)
c. allele combination for a trait (e.g. RR, Rr, rr)
8. If you have an allele that is recessive it is _______?
a. stronger of two genes expressed in the hybrid; represented by a capital letter (R) gene that
b. shows up less often in a cross; represented by a lowercase letter (r)
c. allele combination for a trait (e.g. RR, Rr, rr)
9. What is a genotype?
a. stronger of two genes expressed in the hybrid; represented by a capital letter (R) gene that
b. shows up less often in a cross; represented by a lowercase letter (r)
c. allele combination for a trait (e.g. RR, Rr, rr)
10. What is Phenotype?
a. observable trait of an organism (e.g. red, white)
b. gene combination involving 2 dominant or 2 recessive genes (e.g. RR or rr); also called pure
c. gene combination of one dominant & one recessive allele (e.g. Rr); also called a hybrid
11. In the answer choices which best describes a Homozygous genotype –
a. observable trait of an organism (e.g. red, white)
b. gene combination involving 2 dominant or 2 recessive genes (e.g. RR or rr); also called pure
c. gene combination of one dominant & one recessive allele (e.g. Rr); also called a hybrid
12. In the answer choices which best describes a heterozygous genotype?
a. observable trait of an organism (e.g. red, white)
b. gene combination involving 2 dominant or 2 recessive genes (e.g. RR or rr); also called pure
c. gene combination of one dominant & one recessive allele (e.g. Rr); also called a hybrid
13. In discussing Genetics what is meant by the Law of Independent Assortment
a. During the formation of gametes (eggs or sperm), the two alleles responsible for a trait separate
from each other.
b. Alleles for different traits are distributed to sex cells (& offspring) independently of one
another.
14. In discussing Genetics what is meant by the Law of Segregation
a. During the formation of gametes (eggs or sperm), the two alleles responsible for a trait separate
from each other.
b. Alleles for different traits are distributed to sex cells (& offspring) independently of one another