Genetics Review Question Preview (ID: 23524)
Review Of Genetics Terms And Practice.
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A _____________ trait is expressed (seen) only if both genes of a pair code for that trait.
a) heterozygous
b) phenotype
c) recessive
d) dominant
A ______________ gene is one gene of a pair for a specific trait.
a) allele
b) heterozygous
c) phenotype
d) recessive
____________ means that both genes of a pair are alike, either both dominant or both recessive
a) heterozygous
b) dominant
c) homozygous
d) recessive
Which of the following best represents a genotype?
a) blue eyes
b) Rd
c) WWw
d) Tt
What does that notation TT mean to genetics?
a) at least one dominant gene
b) two dominant genes
c) one dominant and one recessive gene
d) two recessive genes
The fruit fly normally has 8 chromosomes in the body cells. Each fruit fly parent would provide ____ to the offspring?
a) 8 chromosomes
b) 4 chromosomes
c) 12 chromosomes
d) 6 chromosomes
Scientists call an organism that has two different alleles for a trait a
a) purebred
b) hybrid
c) trait
d) factor
In a Punnett square, a capital letter stands for a _____ allele
a) homozygous
b) dominant
c) recessive
d) heterozygous
_____________ is the physical expression of the genes or how it looks.
a) gene
b) recessive
c) phenotype
d) heterozygous
A ______________ is a small piece of DNA that tells a cell how to express a trait.
a) chromosomes
b) gene
c) dominant
d) recessive
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