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Genetics Review
Test Description: Review of genetics terms and practice
Instructions: Answer all questions to get your test result.
1) A _____________ trait is expressed (seen) only if both genes of a pair code for that trait.
A
phenotype
B
dominant
C
heterozygous
D
recessive
2) A ______________ gene is one gene of a pair for a specific trait.
A
heterozygous
B
allele
C
phenotype
D
recessive
3) ____________ means that both genes of a pair are alike, either both dominant or both recessive
A
dominant
B
recessive
C
homozygous
D
heterozygous
4) Which of the following best represents a genotype?
A
WWw
B
Rd
C
blue eyes
D
Tt
5) What does that notation TT mean to genetics?
A
one dominant and one recessive gene
B
two recessive genes
C
two dominant genes
D
at least one dominant gene
6) The fruit fly normally has 8 chromosomes in the body cells. Each fruit fly parent would provide ____ to the offspring?
A
4 chromosomes
B
12 chromosomes
C
6 chromosomes
D
8 chromosomes
7) Scientists call an organism that has two different alleles for a trait a
A
purebred
B
trait
C
hybrid
D
factor
8) In a Punnett square, a capital letter stands for a _____ allele
A
recessive
B
homozygous
C
dominant
D
heterozygous
9) _____________ is the physical expression of the genes or how it looks.
A
phenotype
B
recessive
C
gene
D
heterozygous
10) A ______________ is a small piece of DNA that tells a cell how to express a trait.
A
recessive
B
chromosomes
C
dominant
D
gene
*select an answer for all questions
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