WorksheetsGenetics Review
Total questions: 53
Worksheet time: 51mins
____________ are different version of a gene.
Traits
Alleles
Hybrids
Purebreds
Which of these will show a dominant phenotype?
TT
Tt
tt
Both TT and Tt
Which of these will display a recessive phenotype?
FF
Ff
ff
Both FF and Ff
Organisms that have two different alleles for a particular trait are said to be
hybrid
homozygous
heterozygous
dominant
The physical characteristics of an organism are its
genotype
mutations
hybrid
phenotype
An organism's genotype is its
genetic makeup
feather color
physical appearance
stem height
In a pedigree, circles represent
males
females
offspring
marriage
One homozygous parent has a small mouth. The other homozygous parent has a large mouth. Their heterozygous offspring has a medium-sized mouth. This is
simple dominance
codominance
incomplete dominance
One homozygous parent has brown fur. The other homozygous parent has white fur. Their heterozygous offspring has white and brown fur. This is
simple dominance
codominance
incomplete dominance
Purple eyebrows are dominant over pink eyebrows.
If you are looking at a creature with purple eyebrows, can you know it's exact genotype?
Yes - It will be ee.
Yes, it will be EE.
No, it could be Ee or ee.
No, it could be EE or Ee.
Purple eyebrows are dominant over pink eyebrows.
If you are looking at a creature with pink eyebrows, can you know it's exact genotype?
Yes - It will be ee.
Yes, it will be EE.
No, it could be Ee or ee.
No, it could be EE or Ee.
In chickens, black and white feathers are co-dominant. Cross a black chicken with a white chicken. What % of the offspring will be speckled?
25%
50%
0%
100%
In cows, red and white are co-dominant and make roan. A roan cow is crossed with a red bull. What % of offspring is roan?
25%
0%
50%
100%
In horses, red and white are co-dominant and make roanWhat is the probability that 2 roan horses will have roan offspring?
25%
50%
75%
100%
What goes in box 3
Aabb
AABB
AAbb
aaBb
(RRYY x rryy)
R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.
This cross would be
BBEE x bbee
BBEe x BbEe
BbEE x BbEe
BBee x BBEE
parent 2: ggBb
Find the gametes for parent 1.
In the punnett square below, what belongs in the missing square
In a plant called jimsonweed, flowers can be white or purple. A jimsonweed plant with white flowers is crossed with a jimsonweed plant with purple flowers. All of the offspring have purple flowers.
Based on the results of the cross, which of the following statements most likely describes the alleles for flower color in jimsonweed?
The allele for purple flowers is recessive to the allele for white flowers.
The allele for purple flowers is dominant to the allele for white flowers.
The allele for purple flowers has mutated more times than the allele for white flowers.
The allele for purple flowers is on a different chromosome than the allele for white flowers.
Snap dragon color is a incomplete dominant trait. A red flower is crossed with white flower? What color are flowers that are produced?
Which of these will show a dominant phenotype?
TT
Tt
tt
Both TT and Tt
In flies, red eyes (R) are dominant to brown eyes (r). A heterozygote fly is crossed with a homozygous recessive fly. What percentage of offspring will have brown eyes?
25%
50%
75%
100%
In a plant species, long stems (L) are dominant to short stems (l). A heterozygous plant is crossed with a homozygous dominant plant. What percentage of offspring will have short stems?
25%
50%
75%
0%
In a species of mammals, gray fur (G) is dominant to white fur (g). Two heterozygous mammals are mated together and produce offspring. What fraction of offspring will have gray fur?
1/4
1/2
3/4
2/4
In a species of mammals, gray fur (G) is dominant to white fur (g). Two heterozygous mammals are mated together and produce offspring. What percentage of the offspring will have white fur?
25%
50%
75%
100%
Having attached earlobes (e) is recessive to unattached earlobes (E). A man with genotype (Ee) and a woman with attached earlobes have a child. What is the percent chance the child has attached earlobes?
25%
50%
75%
100%
For haemophilia, let H be the normal allele and h the mutant allele.
Which is the genotype of the unaffected male?
XhY
XHXH
XHXh
XHY
Color blindness is carried by the X chromosome.
A mother is a carrier of color blindness. Her husband has normal vision.
The probability of having a color blind offspring is (a) percent.
Which of the following genotypes is a female with normal vision? (select all that apply)
XBXb
XBXB
XbXb
XBY
Are males or females more likely to be carriers for sex-linked traits?
Males
Females
Both
A MALE HAS TYPE AB BLOOD, HE MARRIES A FEMALE THAT HAS TYPE B BLOOD. THEIR CHILD HAS TYPE O BLOOD, IS THIS POSSIBLE?
Yes
No
A MALE HAS TYPE A BLOOD, HE MARRIES A FEMALE THAT HAS TYPE B BLOOD. THEIR CHILD HAS TYPE AB BLOOD, IS THIS POSSIBLE?
Yes
No
A FEMALE WHO IS A CARRIER FOR MALE PATTERN BALDNESS MARRIES A MAN WHO HAS MALE
PATTERN BALDNESS, WHAT IS THE POSSIBILITY THAT THEIR FEMALE OFFSPRING WILL BE A CARRIER FOR MALE PATTERN BALDNESS?
0%
25%
50%
75%
A FEMALE WHO IS A CARRIER FOR MALE PATTERN BALDNESS MARRIES A MAN WHOSE FATHER HAS MALE
PATTERN BALDNESS, WHAT IS THE POSSIBILITY THAT THEIR OFFSPRING WILL HAVE MALE PATTERN BALDNESS?
0%
25%
50%
75%
Cystic fibrosis is an autosomal recessive disease .
Study the pedigree what are the possible genotypes of #10? (more than one answer)
AA
Aa
aa
XAXa
