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WorksheetsGenetics Unit Review
Total questions: 16
Worksheet time: 11mins
Gregor Mendel crossed true-breeding plants that had green pea pods with true-breeding plants that had yellow pea pods. The resulting F1 generation all had green pods. What did he observe in the F2 generation?
He observed green and yellow pea pods in a 3:1 ratio because the F1 generation was heterozygous
He observed green and yellow pea pods in a 1:1 ratio because the F1s were homozygous
He observed green and yellow pea pods in a 1:3 ratio because the F1 generation was heterozygous
He observed green and yellow pea pods in a 9:3:3:1 ratio because the F1 generation was heterozygous.
What is the inheritance pattern that is sometimes also called "quantitative inheritance"?
Multiple Alleles
Codominance
Incomplete Dominance
Polygenic Inheritance
Mendel crossed dihybrid pea plants RrYy and RrYy. What is the probability the cross results in offspring with the genotype rryy?
9/16
3/16
1/16
1/8
Mrs. Brown and Mr. Brown just had a baby, Peter. Peter has type O blood. What are the potential blood types of Mr. and Mrs. Brown?
AB x AO
AO x BO
AA x BO
OO x AO
Rhesus Factor is a dominant trait controlled by the gene "R". If Peter is heterozygous for Rhesus factor, what cross would his parents have to be?
RR x Rr
rr x RR
rr x rr
RR x RR
Rory made a Punnett square below to show the possible genotypes of a cross between two pea plants. What is the ratio of the phenotypes expressed by the offspring?
3:1
9:3:3:1
1:1
1:9:16
A red snapdragon flower and a white snapdragon flower cross-pollinate. The F1s show an incomplete dominance inheritance pattern. What is the phenotype of the F1s?
all flowers are red
all flowers are white
all flowers are pink
all flowers are red and white
A black cat and a white cat have grey kittens. The F1 grey kittens then have a litter of kittens. What is the ratio of coat color phenotype the F2 kittens will show?
All grey kittens
2 grey: 2 black
1 black: 2 grey: 1 white
1 grey: 2 black: 1 white
The different forms of a single gene are called...
alleles
gametes
zygotes
the principle of independent assortment states that...
if there are two alleles for a trait, the dominant trait will show in the phenotype
biological characteristics are determined by individual units called genes, which are passed from parent to offspring
genes for different traits move apart independently during the formation of gametes
Hemophilia is an X linked recessive disorder. If a female carrier marries a normal male, what is the chance a daughter will have hemophilia?
0%
25%
50%
100%
If a female who is a carrier for hemophilia marries a normal male, what is the chance that one of their sons will have hemophilia?
0%
25%
50%
100%
In rabbits, fur color is controlled by multiple alleles. cch (chinchilla) fur is dominant to cc (albino). If a homozygous chinchilla rabbit has bunnies with an albino rabbit, what is the likelihood a bunny will be albino?
0%
25%
50%
75%
What is the difference between multiple alleles and polygenic inheritance?
Multiple alleles: one trait has many alleles. Polygenic inheritance: a trait is controlled by many genes.
Multiple alleles: one trait is controlled by many genes. Polygenic inheritance: one trait has many alleles
A red cow and a white cow mating and having a roan (red and white) cow is an example of....
incomplete dominance
polygenic inheritance
codominance
multiple alleles
A parent with the genotype AAbbCC is going to pass on what alleles to a gamete?
AA, bb, CC
A, b, C
AA, b, C
a, B, c
