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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
recessive
D
heterozygous
2) A ______________ gene is one gene of a pair for a specific trait.
A
heterozygous
B
recessive
C
allele
D
phenotype
3) ____________ means that both genes of a pair are alike, either both dominant or both recessive
A
heterozygous
B
recessive
C
dominant
D
homozygous
4) Which of the following best represents a genotype?
A
Tt
B
WWw
C
Rd
D
blue eyes
5) What does that notation TT mean to genetics?
A
one dominant and one recessive gene
B
two dominant genes
C
at least one dominant gene
D
two recessive genes
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
8 chromosomes
D
6 chromosomes
7) Scientists call an organism that has two different alleles for a trait a
A
trait
B
purebred
C
factor
D
hybrid
8) In a Punnett square, a capital letter stands for a _____ allele
A
heterozygous
B
homozygous
C
dominant
D
recessive
9) _____________ is the physical expression of the genes or how it looks.
A
heterozygous
B
phenotype
C
gene
D
recessive
10) A ______________ is a small piece of DNA that tells a cell how to express a trait.
A
gene
B
chromosomes
C
dominant
D
recessive
*select an answer for all questions
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