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WorksheetsMeiosis & Genetics
Total questions: 19
Worksheet time: 20mins
Name
Class
Date
1.
The genetic makeup of an organism or what represents the letters in a Dihybrid Cross
a)
allele
b)
genotype
c)
phenotype
d)
karyotype
2.
What describes the physical appearance of a trait?
a)
allele
b)
genotype
c)
phenotype
d)
karyotype
3.
If alleles look like Aa in a genotype it is said to be
a)
homozygous
b)
heterozygous
c)
incomplete dominant
d)
codominant
4.
If alleles look like AA in a genotype it is said to be
a)
homozygous
b)
heterozygous
c)
incomplete dominant
d)
codominant
5.
Trait will always show up in an organism if the allele is present
a)
recessive
b)
dominant
c)
incomplete dominant
d)
codominant
6.
This all is covered up when a dominant allele is present
a)
recessive
b)
dominant
c)
incomplete dominance
d)
co-dominant
7.
What shows the possible combinations of alleles that can result from a genetic cross?
a)
bar graph
b)
pie chart
c)
punnett square
d)
co-dominant graph
8.
If two heterozygous tall plants are crossed, and tall is dominant. What would be your expected phenotypes?
a)
100% tall
b)
75% tall, 25%short
c)
50% tall, 50%short
d)
25% tall, 75% short
9.
Unattached earlobes (E) is dominant. Attached earlobes (e) is recessive. A woman with the genotype (Ee) and a man with the genotype (ee) have a child. What is the probability that the child is heterozygous?
a)
0%
b)
25%
c)
50%
d)
75%
10.
If the allele for gray fur (G) is dominant to the allele for white fur (g) in mice, What will be the ratio if you cross a heterozygous gray mouse with a white mouse?
a)
3GG : 0Gg : 1gg
b)
2GG : 1Gg : 1gg
c)
1GG : 2Gg : 1gg
d)
0GG : 2Gg : 2gg
11.
If a purebred, normal feathered bird (FF) is crossed with a frizzy-feathered bird (ff) how many different phenotypes would you have?
a)
1
b)
2
c)
3
d)
4
12.
Tomato plants usually have hairy stems. Hairless stems are present in tomato plants that are homozygous recessive for this trait. If the stem characteristics are determined by a single gene, what is the expected outcome of crossing two tomato plants that are heterozygous for hairy stems?
a)
100% hairless stems
b)
100% hairy stems
c)
50% hairy stems : 50% hairless stems
d)
75% hairy stems : 25% hairless stems
13.
In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected?
a)
0BB : 2Bb : 2bb
b)
1BB : 2Bb : 1bb
c)
2BB : 0Bb : 2bb
d)
2BB : 1Bb : 0bb
14.
What is going to be the genotype that is missing?
a)
AABb
b)
AABB
c)
AAbb
d)
aaBB
15.
Which produces the greatest amount of genetic variation?
a)
Sexual reproduction with few mutations
b)
Sexual reproduction with many mutations
c)
Asexual reproduction with few mutations
d)
Asexual reproduction with many mutations
16.
Cell created at the end of meiosis are best known as
a)
somatic cells
b)
gamete cells
c)
skin cells
d)
diploid cells
17.
If human body cells have 46 chromosomes, how many chromosomes will be in gamete cells after meiosis?
a)
92
b)
46
c)
23
d)
12
18.
What is the benefit of the chromosomes lining up in pairs during meiosis?
a)
When the chromosomes line up in pairs, each daughter cell will receive twice the number of chromosomes as the parent cell.
b)
When the chromosomes line up in pairs, each daughter cell will receive half the number of chromosomes as the parent cell.
c)
When the chromosomes line up in pairs, the DNA is protected from damage and cannot mutate.
d)
When the chromosomes line up in pairs, the DNA in each chromosome is exactly the same.
19.
What is being depicted in this picture?
a)
sexual reproduction
b)
anaphase I of meiosis
c)
crossing-over
d)
replication
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