WorksheetsGenetics test review
Total questions: 20
Worksheet time: 16mins
What fraction of individuals will be homozygous dominant?
1/3
1/2
2/3
1/4
Freckles are dominant over not having freckles. If the following cross occurred, Ff x Ff, what percentage of the offspring would you expect to NOT have freckles?
100%
75%
50%
25%
Two identical alleles for a trait is known as
homozygous
heterozygous
mutation
codominance
What are an individual's traits determined by?
(a)
What is the definition of phenotype?
The physical expression of a trait
The genetic combination of alleles
A gene on the DNA strand
A variation of a gene
How many offspring will show the recessive trait?
0%
25%
50%
75%
In humans, the ability to roll one's tongue is dominant over the inability to do so. Two parents that are both heterozygous for tongue rolling have children. What are all possible genotypes of the children?
(a)
Which of the following is homozygous dominant?
RR
Rr
rR
rr
One uppercase and one lowercase letter are alleles for what type of trait?
Homozygous
Heterozygous (hybrid)
Phenotype
Allele
Red and white flowers cross and produce pink flowers. (Incomplete dominance). If two pink flowers are crossed, show all possible genotypes of the offspring.
RW
RW,WW
WW,RR
RR,RW,WW
Who is the father of genetics?
Darwin
Mendel
Einstein
Franklin
A father is heterozygous for right-handedness. The mother is homozygous for right-handedness. What percent of the children are expected to be homozygous for right-handedness?
25%
75%
100%
The branch of biology that focuses on heredity is called _______.
genetics
traits
translation
protein synthesis
Brown fur is dominant over white fur in dogs. Two white dogs are crossed. What are all possible phenotypes of the puppies?
all white
all brown
white and brown
Traits that are passed down and are found in your DNA are called _____________ traits.
inherited
acquired
homozygous
heterozygous
An organism’s genetic makeup; the pair of alleles for a trait is called a(n)
dominant trait
genotype
phenotype
recessive trait
What is the term for the study of how traits are passed from parents to offspring?
Genes
Epigenetics
Genetics
Acquired
How many are hybrids?
0%
25%
50%
100%
