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WorksheetsGenetic Combinations Review
Total questions: 16
Worksheet time: 10mins
Sickle cell anemia is a condition that affects the shape of a red blood cell. An unaffected individual can be represented with the genotype AA. An affected individual can be represented with the genotype SS. Individuals that are carriers have the genotype AS.
Sickle cell anemia is best described by the term
Co- Dominant
Incomplete Dominance
Homozygous Recessive
Complete Dominance
In mice, a certain species displays incomplete dominance in coat coloring. The offspring of a black (BB) mouse and a white (bb) mouse are gray (Bb) mice. A cross between two gray mice will most likely produce offspring with which percent of coat colors?
25% white, 25% black, 50% gray
25% gray, 25% black, 50% white
25% gray, 75% white
25% black, 75% gray
The chart shows a dihybrid cross between pea plants. What are the genotypes of the parents in this cross?
RrYY and Rryy
RRYY and rryy
RrYy and RrYy
RRyy and rrYY
In the dihybrid cross for pea plants shown below, R is dominant for round peas, r is recessive for wrinkled peas, Y is dominant for yellow peas, and y is recessive for green peas. A student could accurately make which statements about the offspring of this cross?
There is no chance of having any wrinkled, green peas.
There is a 100% chance of having round, green peas.
There is no chance of having any round, yellow peas.
There is a 50% chance of having round, yellow peas.
A snapdragon plant with red flowers (RR) is crossed with a snapdragon plant with white flowers (WW). Snapdragon flowers show incomplete dominance. A Punnett square of the cross is shown below.
If the cross produces four offspring, how many of each color flower would likely be produced?
four red flowers
four pink flowers
two red flowers and two pink flowers
two white flowers and two pink flowers
Which biomolecules are found in all organisms?
glucose, maltose, fructose, sucrose
adenine, cytosine, thymine, guanine
chlorophyll, chitin, pepsin, glycogen
cholesterol, phospholipid, cellulose, gibberellin
Which of these shows the correct order for the central dogma of molecular biology?
DNA to RNA to protein
protein to DNA to RNA
RNA to DNA to protein
DNA to protein to RNA
Proto-oncogenes code for proteins that stimulate cellular growth and division. What happens when these genes fail to regulate the amount of protein produced?
Cells stop growing and enter the G0 phase of the cell cycle.
Cells continue to grow and divide in an uncontrolled manner.
Neighboring cells send out chemical signals that start apoptosis.
Neighboring cells respond to the proteins and begin uncontrolled growth.
In humans, a V-shaped hairline is dominant over a straight hairline. If one parent is homozygous for a V-shaped hairline (HH) while the other parent is homozygous for a straight hairline (hh), what is the probability that the offspring of these parents will have a straight hairline?
**Write your answer with number and %
example: 1%
(a)
Genetic crosses involving a particular type of flower exhibit complete dominance with respect to petal color. Red (R) is dominant to white (r).
Using the Punnett square, what is the expected percentage of offspring that will have white flowers from a cross of parent flowers with a genotype of Rr.
**Write your answer with a number and %
EXAMPLE: 1%
(a)
There are four blood types: A, B, AB, and O. The genes for both A and B blood types are dominant over O.
What is the probability of a father with blood type O and a mother with blood type AB producing a child with blood type O?
Write your answer as a number and %
Example: 1%
(a)
A man has a recessive genetic condition that neither of his parents expressed. His wife does not have this condition. However, she is a carrier. Based on this information, which Punnett square correctly predicts the probability that their children will have this genetic condition?
The ABO blood group has three different alleles: IA, IB, and i. The genotypes and phenotypes (blood types) for different combinations of the three alleles are shown in the table.
What percentage of offspring from a cross between a homozygous Type A parent with a heterozygous Type A parent is expected to contain the i allele?
25%
50%
75%
100%
What types of cells are found only in organisms that reproduce sexually?
gametes
blood cells
Neurons
skin cells
The karyotype diagram below represents a human female with the genetic disorder known as Turner syndrome.
Chromosomal analysis of this karyotype reveals the mutation is a result of
a missing X chromosome.
an extra chromosome on chromosome 9.
a deletion of a section of chromosome 21.
All of the above
The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait.
Based on this pedigree, what are the most likely genotypes of individuals 1 and 2?
I-1: aa
I-2: Aa
I-1: AA
I-2: Aa
I-1: Aa
I-2: aa
I-1: aa
I-2: AA
