Genetics Review Question Preview (ID: 55530)
Review For A Test Covering 8th Grade Level Genetics.
TEACHERS: click here for quick copy question ID numbers.
Which trait is most likely determined by genes?
a) how old a person is
b) what a person likes to eat
c) when a person wakes up
d) whether a person has dimples
Why were pea plants used in early genetic experiments?
a) They grew fast and produced a lot of offspring.
b) Their mating was easy to control
c) They had very distinct traits (ex, either purple or white flowers, either short or tall stems, ect).
d) All of the above.
Where do an organism’s genes come from?
a) the mother only
b) the father only
c) the mother and the father
d) neither the mother or father
Who is the monk known as the father of genetics?
a) Mendel
b) Rutherford
c) Watson
d) Welch
What is a phenotype?
a) what you can see about a trait
b) what genes a person or thing has
c) when you have two different alleles
d) when you have two of the same alleles
What is a genotype?
a) what you can see about a trait
b) what genes a person or thing has
c) when you have two different alleles
d) the allele you use an upper case letter for
What is the term for a form of a gene?
a) allele
b) heredity
c) trait
d) genotype
Which is a heterozygous genotype?
a) Hh
b) HH
c) hh
d)
Which is a homozygous genotype?
a) Dd
b) dd
c) dD
d)
Which is a homozygous dominant genotype?
a) Ff
b) ff
c) FF
d)
f B=brown and b=blue, we know that blue is recessive and brown is _________________.
a) a gene
b) recessive
c) a trait
d) dominant
If a baby goat received a dominant gene for curly hair from one parent, and a recessive gene for straight hair from the other, which trait will the baby goat display?
a) No hair
b) Curly hair
c) Straight hair
d) Straight and curly hair
The allele for yellow seeds in pea plants, Y, is dominant. The allele for green seeds in pea plants, y, is recessive. Which combination would produce a plant with green seeds?
a) YY
b) Yy
c) yY
d) yy
In humans, the allele for brown eyes, B, is dominant over the allele for blue eyes, b. Which combination of alleles shown below could result in a person with blue eyes?
a) BB
b) Bb
c) bB
d) bb
What is the difference between phenotype and genotype?
a) Phenotype is the physical expression of a trait and genotype is all of the alleles in the organism.
b) Genotype is the physical expression of a trait and phenotype is all of the alleles in the organism.
c) Phenotype are the alleles that are masked and genotype are the alleles that are expressed.
d) Phenotype is when both alleles are the same and genotype is when the alleles are different.
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