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WorksheetsGenetics, crosses, karyotypes, meiosis
Total questions: 35
Worksheet time: 38mins
Name
Class
Date
1.
The trait expressed if only one allele is present is the ___ allele
a)
Dominant
b)
Recessive
c)
Genotype
d)
Exterior
2.
If a T represents an allele and a t represents the other possible allele what is t representing?
a)
Dominant trait
b)
Recessive Trait
c)
Sex Linked Trait
d)
Limited expression in the population
3.
Crossing a pea plant with green peas and a pea plant with yellow peas is an example of a(n)
a)
dihybrid cross
b)
incomplete dominant trait
c)
monohybrid cross
d)
a cross with multiple alleles
4.
A dog with blue eyes and black hair is bred with a dog with brown eyes and yellow fur. The resulting dogs are all brown eyed and black furred. This is an example of
a)
a dihybrid cross
b)
a monohybrid cross
c)
codominance
d)
incomplete dominance
5.
A dog with blue eyes and black hair is bred with a dog with brown eyes and yellow fur. The resulting dogs are all brown eyed and black furred. What are the possible symbols for the alleles?
a)
BY
b)
BBee
c)
XBY
d)
Bb
6.
A dog with brown eyes and black hair is bred with a dog with brown eyes and black fur. Both are heterozygous for each trait. What is a possible phenotypic ratio for this cross
a)
9:3:3:1
b)
3:1
c)
1:1
d)
6:1
7.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
c)
Monohybrid cross
d)
Dihybrid cross
8.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance (Complete Dominance)
d)
Homozygous Inheritance
9.
The different forms of a gene are called
a)
traits
b)
pollinators
c)
alleles
d)
hybrids
10.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
11.
A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?
a)
4: Orange and White
b)
1: Orange : 1 White
c)
2 Orange: 2 Orange and White: 0 White
d)
1: Orange: 2 Orange and White: 1 White
12.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
13.
How many alleles does an individual have for each trait?
a)
1
b)
2
c)
3
d)
4
14.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
15.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
16.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
17.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
18.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
19.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
20.
What is NOT a possible genotype for someone with type B blood?
a)
BB
b)
AB
c)
BO
21.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
22.
A man with type O blood is accused of being the father of a type B baby. The mother is type A. Could this man be the father?
a)
Yes
b)
No
23.
What blood type would an individual have if this was one of the cells seen under a microscope?
a)
Type A
b)
Type B
c)
Type AB
d)
Type O
24.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
25.
How many PAIRS of chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
26.
How many PAIRS of sex chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
27.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
28.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
29.
What is the haploid number for this Karyotype?
a)
26
b)
27
c)
52
d)
54
30.
What chromosome is affected by Down's Syndrome?
a)
23
b)
18
c)
13
d)
21
31.
A zygote has 4 chromosomes, how many chromosomes were in the gametes?
a)
2
b)
4
c)
8
d)
1
32.
How many cell divisions does meiosis have?
a)
1
b)
2
c)
4
d)
0
33.
Which of the following is a true statement about gametes?
a)
In humans, there are 22 pair of autosomes in a gamete.
b)
Gametes have a diploid number of chromosomes.
c)
Gametes are body cells
34.
A diploid cell of a normal male human contains
a)
22 autosomes and two Y-chromosomes.
b)
22 pairs of autosomes and two Y-chromosomes.
c)
22 pairs of autosomes, one X and one Y-chromosome
d)
22 autosomes and two X-chromosomes
35.
a)
This karyotype shows Trisomy 21
b)
This karyotype has no abnormality
c)
This karyotype is missing a sex chromosome
d)
This karyotype is from a gamete
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