WorksheetsExploring Inheritance Patterns in Biology
Total questions: 39
Worksheet time: 54mins
What is the basic unit of heredity that is passed from parents to offspring through the DNA on a chromosome?
Chromosome
Gene
Protein
Lipid
Which of the following is an example of non-Mendelian inheritance?
Complete dominance
Codominance
Independent assortment
Segregation
During meiosis, how many daughter cells are produced from a single parent cell?
1
2
3
4
If a pea plant is heterozygous for a trait (Tt), what are the possible gametes it can produce?
TT, tt
T, t
Tt, Tt
T, T
In a dihybrid cross between two heterozygous parents (AaBb x AaBb), what is the probability of obtaining an offspring with the genotype AABB?
161
41
81
21
Explain why meiosis is important for genetic diversity.
It produces identical cells.
It reduces the chromosome number by half.
It allows for crossing over and independent assortment.
It occurs in somatic cells.
Predict the phenotypic ratio of offspring from a monohybrid cross between two heterozygous parents (Tt x Tt) for a trait where T is dominant over t.
1:1
3:1
1:2:1
2:2
A plant with red flowers (RR) is crossed with a plant with white flowers (rr). If the red and white alleles show incomplete dominance, what will be the phenotype of the offspring?
Red
White
Pink
Red and white spotted
Describe how a Punnett square can be used to predict the genotypes of offspring in a genetic cross.
It shows the physical appearance of the offspring.
It lists all possible alleles from one parent.
It organizes and predicts the possible combinations of alleles from both parents.
It calculates the exact number of offspring.
In a cross between two organisms, one with genotype AaBb and the other with genotype aabb, what are the possible genotypes of the offspring?
AaBb, Aabb, aaBb, aabb
AaBb, AABB, aabb, AAbb
AaBB, aaBB, AAbb, aabb
AABB, AaBB, AAbb, aaBB
According to mendelian inheritance you will always inherit ___ allele(s) for each trait from each parent giving you ___ allele(s) for your genotype.
1
2
2
4
3
4
4
6
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross a red flower with a speckled flower. What is the phenotypic ratio?
2 red, 2 speckled
2 red, 2 blue
2 blue, 2 speckled
In chickens, feather color is codominant. If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?
25%
50%
75%
100%
In a dihybrid cross between two parents with the genotypes SsYy and SsYy, what is the predicted phenotypic ratio of the offspring?
4:4:4:4
12:4:4:1
9:3:3:1
6:2:2:6
In humans, the haploid number of chromosomes is ____.
23
46
69
92
Which of the following is the best definition for MEIOSIS?
the process of two haploid cells uniting
the counting of chromosomes within a diploid cell
a two-step process that reduces the number of chromosomes in half such that there is only one copy of all the chromosomes
the equational division of a cell into two identical copies
In humans, the diploid number of chromosomes is ____.
23
46
69
92
If a mother is a carrier of a recessive sex linked trait but the father is does not have the recessive sex linked trait, what is the chance their offspring WILL have the trait?
0%
25%
75%
100%
True or False? Before cells undergo meiosis they pass through interphase first.
true
false
In Anaphase I, the _________ are separated by the pulling of the spindle fibers to opposite poles of the cell.
homologous pairs of chromosomes
sister chromatids
centromeres
centrosomes
Check all of the following that DO occur during Telophase I and cytokinesis.
The separated homologous chromosomes are at opposite poles of the cell.
The cell divides in two.
The chromosomes do not uncoil, since they are getting ready for Meiosis II.
Sister chromatids are pulled away from each other.
At the start of Meiosis II, which of the following is NOT true?
There are two cells.
The cells are haploid.
The chromosomes are paired up as homologues.
DNA is present as two sister chromatids joined at the centromere.
How many cells are formed at the end of Meiosis II?
2
3
4
8
True or False. In Meiosis II, there are TWO cells that go through each phase at the same time.
true
false
Which of the following are CORRECT observations about the differences between MITOSIS and MEIOSIS? (Check all that apply.)
Mitosis produces cells that identical to the parent cell.
Meiosis produces cells that have half the number of chromosomes as the parent cell.
All cells go through INTERPHASE as part of the cell cycle, whether it goes to mitosis or meiosis next.
In both types of cell division, the chromosomes are only duplicated once.
Only in Mitosis, do you see chromosomes pair up to form a tetrad.
Which part of MEIOSIS is identical to MITOSIS?
Meiosis I
Meiosis II
The products of MEIOSIS have _______ number of chromosomes.
haploid
diploid
Mitosis creates 2 diploid cells identical to the original cell.
True or False.
True
False
Curly hair and the ability to taste the chemical PTC are inherited traits. Curly hair (H) is always dominant to straight hair (h). The ability to taste PTC (P) is always dominant to not being able to taste PTC (p). The alleles for straight hair and a non-taster for PTC are recessive.
If both parents are heterozygous for both traits, what would be the genotype of an offspring with straight hair and the ability to taste PTC?
HhPp
hhPp
Hhpp
hhpp
When crossed with the genotype AaBb, which genotype would result in a 50% chance of producing offspring with the alleles AA?
AaBb
AABb
Aabb
aaBB
Achondroplasia is an inherited condition that affects the formation of bone in humans. The allele for achondroplasia (A) is dominant to the unaffected allele (a).
If a person who is homozygous dominant has children with a person who is homozygous recessive, what percentage of their children will likely have achondroplasia?
25%
50%
75%
100%
According to this diagram/pedigree how many of the men in this family were affected?
1
2
3
4
Hemophilia is a recessive trait. In the last generation one of the female children is a carrier while the other has the hemophiliac condition. Which answer choice best explains the genotypes for the parents of these girls?
Mom-Hh
Dad -hh
Mom-HH
Dad-HH
Mom-hh
Dad-hh
