WorksheetsGenetics test review
Total questions: 20
Worksheet time: 16mins
What are an individual's traits determined by?
(a)
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)
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
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%
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
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%
An organism’s genetic makeup; the pair of alleles for a trait is called a(n)
dominant trait
genotype
phenotype
recessive trait
Two identical alleles for a trait is known as
homozygous
heterozygous
mutation
codominance
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
Who is the father of genetics?
Darwin
Mendel
Einstein
Franklin
What is the term for the study of how traits are passed from parents to offspring?
Genes
Epigenetics
Genetics
Acquired
Traits that are passed down and are found in your DNA are called _____________ traits.
inherited
acquired
homozygous
heterozygous
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
How many offspring will show the recessive trait?
0%
25%
50%
75%
How many are hybrids?
0%
25%
50%
100%
What fraction of individuals will be homozygous dominant?
1/3
1/2
2/3
1/4
The branch of biology that focuses on heredity is called _______.
genetics
traits
translation
protein synthesis
