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Monohybrid Review
Test Description: Vocab Practice problems
Instructions: Answer all questions to get your test result.
1) What is an allele?
A
a different gene
B
a type of trait
C
the physical appearance of something
D
an alternate form of a gene
2) Phenotype refers to ___________ , while genotype refers to _________.
A
the physical appearance; the genetic makeup
B
recessive trait; dominant trait
C
the genetic makeup; the physical appearance
D
dominant trait; recessive trait
3) Which of these allele combinations are heterozygous?
A
Mn
B
nn
C
Mm
D
MM
4) Gametes are __________ that are _______.
A
sex cells; diploid
B
somatic cells; haploid
C
sex cells; haploid
D
somatic cells; diploid
5) A tall plant (T) is dominant to short plant (t). If all offspring of a cross are heterozygous what are the genotypes of the parents?
A
TT and Tt
B
TT and tt
C
Tt and tt
D
Tt and Tt
6) A heterozygous tall plant (Tt) is crossed with another heterozygous tall plant. What percent of the plants should have a tall phenotype?
A
0%
B
75%
C
50%
D
25%
7) Yellow pea pods (Y) are dominant over green pods (y). A heterozygote is crossed with a homozygour dominant plant. What are the possible genotypes?
A
YY and Yy
B
green and yellow
C
yellow and green
D
yy and Yy
8) If one fruit fly is heterozygous (red) and the other is homozygous recessive (white), what percent of the offspring should have been expected to have white eyes?
A
75%
B
25%
C
50%
D
0%
9) Humam gametes have ____ chromosomes.
A
23
B
46
C
4
D
92
10) In rabbits, grey hair is dominant to white and black eyes are dominant to red eyes. A homozygous grey, black eyed rabbit is crossed with a homozygous white, red eyed rabbit. What percentage of their children will have grey fur and black eyes?
A
0%
B
50%
C
100%
D
25%
*select an answer for all questions
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