WorksheetsReview & Reinforcement for Unit 2 Test Semester 2 Biology Summer
Total questions: 47
Worksheet time: 24mins
Name
Class
Date
1.
A family has three daughters. The mother is pregnant for the fourth time. What is the chance of the fourth child being a son?
a)
25%
b)
50%
c)
75%
d)
100%
2.
The 4 main stages of mitosis in the correct order are
a)
Anaphase, Telophase, Metaphase, Prophase
b)
Metaphase, Prophase, Anaphase, Telophase
c)
Prophase, Anaphase, Telophase, Metaphase
d)
Prophase, Metaphase, Anaphase, Telophase
3.
Why does meiosis occur during the formation of gametes?
a)
It allows the number of gametes to be doubled.
b)
It prevents asexual reproduction occurring in the life cycle.
c)
It prevents variations appearing in the phenotype.
d)
It produces haploid gametes in preparation for fertilization
4.
Identify the cell division stage.
a)
Prophase
b)
Metaphase
c)
Anaphase
d)
Telophase
5.
If a mother’s genotype is Rr, what type of gametes can she produce?
a)
Only R
b)
Only r
c)
R or r
d)
None of the above.
6.
When does crossing over occur during meiosis?
a)
Prophase I
b)
Metaphase I
c)
Prophase II
d)
Telophase II
7.
Unlike mitosis, meiosis results in
a)
Two genetically identical diploid cells
b)
Four genetically different haploid cells
c)
Four genetically identical haploid cells
d)
Two genetically different diploid cells
8.
What gets segregated and independently assorted during meiosis 1?
a)
Homologous chromosomes
b)
Sister chromatids
c)
Offspring
d)
Gametes
9.
Homologous chromosomes form tetrads during
a)
Prophase of meiosis I
b)
Metaphase of meiosis I
c)
Prophase of meiosis II
d)
Metaphase of meiosis II
10.
What are the genotypes of the parents?
a)
BB x bb
b)
Bb x Bb
c)
bb x bb
d)
bb x Bb
11.
What percentage of the offspring has the same genotype as the parents?
a)
25%
b)
50%
c)
75%
d)
100%
12.
What is the phenotypic ratio of the offspring?
a)
1:2
b)
1:2:1
c)
2:1
d)
3:1
13.
A calico cat shows both traits for orange and black fur. What kind of allele expression is this?
a)
Incomplete dominance
b)
Multiple alleles
c)
Polygenic trait
d)
Codominance
14.
A short-toed animal was crossed with a long-toed animal. All the offspring had short toes. One of these offspring was crossed with another long-toed animal. Which ratio of short-toed to long-toed animals should be expected?
a)
1:1
b)
2:1
c)
3:1
d)
4:1
15.
ABO blood types are an example of
a)
codominance
b)
polygenic inheritance
c)
multiple alleles
d)
A and C
16.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
a)
AO and BO
b)
O and B
c)
O and A
d)
A and B
17.
If a man with type AB blood has a child with a woman who is type A (iA i) blood, which is NOT a possibility for the child?
a)
A
b)
AB
c)
B
d)
O
18.
What is the genotype of a person with type A blood who had a father with type O blood?
a)
AB
b)
AA
c)
AO
d)
OO
19.
What is not a possible genotype for someone with type B blood?
a)
BB
b)
BO
c)
AB
d)
None of the above
20.
A woman has type B blood and her husband has type O blood. What must be the woman's genotype if they have a child with type O blood?
a)
BO
b)
OO
c)
BB
d)
B
21.
In which inheritance pattern are heterozygous individuals a blend of the dominant and recessive phenotypes?
a)
sex-linked inheritance
b)
codominance
c)
complete dominance
d)
incomplete dominance
22.
A roan cow shows co-dominance in fur color (red and white). What is the phenotypic ratio expected if a roan cow (female) and a roan steer (male) mate together?
a)
4 Roan
b)
2 Red: 2 Roan: 0 White
c)
1 Red: 1 White
d)
1 Red: 2 Roan: 1 White
23.
This is when a trait is controlled by more than one gene
a)
multiple alleles
b)
polygenetic inheritance
c)
codominance
d)
incomplete dominance
24.
Type of inheritance that results in a new heterozygous trait that is a blend of both parents. (ie. black fur x white fur results in gray fur)
a)
codominance
b)
recessive
c)
polygenic trait
d)
incomplete dominace
25.
A single gene has 3 or more alternative forms. These are called
a)
heterozygotes
b)
epistatic
c)
multiple alleles
d)
polygenic
26.
A red flowered plant (RR) breeds with a white flowered plan (WW). The gene for petal color in these plants expresses co-dominance. What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
27.
What does co-dominance mean in genetics?
a)
Both alleles are dominant.
b)
Both alleles are recessive.
c)
One allele is expressed more than the other.
d)
Each allele is both dominant and recessive.
28.
A carrier is a person who has
a)
Two recessive alleles for a trait.
b)
Two dominant alleles for a trait.
c)
One recessive and one dominant allele for a trait.
d)
More than two alleles for a trait.
29.
Which allele is always expressed?
a)
Homozygous
b)
Heterozygous
c)
Dominant
d)
Recessive
30.
If the shaded figures show individuals who express the recessive alleles, what are the genoytpes of the parents of the third generation?
a)
mom: homozygous dominant, dad: homozygous recessive
b)
mom: homozygous recessive, dad: homozygous dominant
c)
mom: homozygous dominant, dad: heterozygous
d)
mom: homozygous recessive, dad: heterozygous
31.
How many different types of gametes can a person with the genotype CCAATT provide?
a)
0
b)
1
c)
2
d)
3
32.
Pigmentation in mice is an interaction between genes that are antagonistic, such that one gene masks or interferes with the expression of another. This is called EPISTASIS. The wild-type coat color, agouti (AA) is dominant to solid-colored fur (aa). However, a separate gene (C) is necessary for pigment production. A mouse with recessive c allele at this locus is unable to produce pigment and is albino regardless of the allele present at locus A. Looking at the Punnett square below, all of the following are the genotypes that would express albinism except for
a)
AACc
b)
AAcc
c)
Aacc
d)
aacc
33.
The F1 mom is heterozygous for blood type A and her husband is blood type O. What blood type will the offspring denoted by the white square have?
a)
Type A
b)
Type AB
c)
Type O
d)
Cannot be determined
34.
Hemophilia is a sex-linked recessive trait in humans. If a father and a son are both hemophiliacs, but the mother is normal, her genotype must be____. (Note: the H's are superscripts.)
a)
XhXh
b)
XHXh
c)
XHXH
d)
XhY
35.
Why are sex-linked traits more common in males than in females?
a)
All alleles on the X chromosome are dominant.
b)
All alleles on the Y chromosome are recessive.
c)
A recessive allele on the X chromosome will always produce the trait in a male.
d)
Any allele on the Y chromosome will be codominant with the matching allele on the X chromosome.
36.
How does a geneticist use pedigrees?
a)
to create genetic crosses
b)
to replicate identical strings of DNA
c)
to prove that sex-linked traits are caused by codominant alleles
d)
to trace the inheritance of traits over generations of families
37.
Sex-linked genes are genes on
a)
the X chromosome only
b)
the Y chromosome only
c)
the X and Y chromosomes
d)
all 22 pairs of autosomes
38.
The continuum of height in the progeny (offspring) that could be produced from a tall and short individual is an example of
a)
polygenic inheritance
b)
codominance
c)
multiple alleles
d)
incomplete dominance
39.
What conditions will guarantee that a male offspring will have red-green color blindness?
a)
The father is colorblind.
b)
The mother is colorblind.
c)
The father has the recessive gene.
d)
The mother has the recessive gene.
40.
Why do humans have a range of phenotype possibilities when it comes to eye color?
a)
eye color is controlled by the combined effects of many different pigment genes
b)
eye color is controlled by sex-linked genes and therefore eye pigments differ between males and females
c)
the gene for eye color is very long in its DNA sequence and it codes for multiple pigment proteins
d)
eye color is controlled by a recessive allele and pigment is either present or not present
41.
In pea plants, wrinkled (A) is dominant over smooth and green (B) is dominant over yellow. Based on this Punnett square, what fraction of the offspring will have wrinkled and green seeds?
a)
1/16
b)
3/16
c)
9/16
d)
12/16
42.
What percentage of the female offspring will be a carrier for a recessive disease if mom is a carrier, but dad does not express the phenotype?
a)
0%
b)
25%
c)
50%
d)
100%
43.
How do you identify a Down syndrome karyotype? (3)
4 lines
44.
In guinea pigs, the allele for short hair is dominant. If all the guinea pigs are born short haired, what are the possible genotypes of the parents? Explain the combinations. (3)
4 lines
45.
Ordinary cell division produces 2 genetically identical daughter cells. Give 2 functions of this type of cell division. (3)
4 lines
46.
A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?
a)
3/16
b)
4/16
c)
8/16
d)
12/16
47.
Cross TtCc xTTcc. What percent of F1 generation will be TTCc?
a)
0%
b)
25%
c)
50%
d)
75%
100 %
