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Worksheets11.1 Monohybrid Inheritance
Total questions: 10
Worksheet time: 15mins
Name
Class
Date
1.
In genetic terms, the physical characteristics of an organism is known as
a)
genotypes
b)
phenotypes
c)
a heterozygote
d)
a homozygote
2.
What term is given to an organism that carries two identical alleles of a gene
a)
heterozygous
b)
homozygous
c)
dominant
d)
recessive
3.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
4.
A male rat with the genotype Hh is crossed with a female rat, hh. What is the result of the cross-breeding?
a)
3 black : 1 white
b)
1 black : 1 white
c)
3 white : 1 black
d)
All black
5.
An allele whose trait always shows up in the organism when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
6.
In watermelons, green rinds (G) are dominant to striped rinds (g). What is the genotype of a heterozygous green watermelon?
a)
GG
b)
Gg
c)
gg
d)
green
7.
A tall pea plant (TT) is crossed with a short pea plant (tt). What percentage of the offspring will be tall?
a)
100%
b)
75%
c)
50%
d)
25%
8.
The genotype is the ______________.
a)
physical appearance
b)
Genetic makeup
c)
Alleles gained from one parent
9.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
10.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
75% purple, 25% white
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