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WorksheetsGenetics LT #1 Concepts Test
Total questions: 10
Worksheet time: 13mins
Name
Class
Date
1.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
2.
Who is considered the "father" of modern genetics?
a)
Einstein
b)
Mendel
c)
Disney
d)
Washington
3.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous
4.
The exact genetic makeup of an organism, such as RR, Tt, PP is its?
a)
phenotype
b)
dominance
c)
genotype
d)
trait
5.
Females-XX; MalesXY. A couple has 4 girls. What is the chance the next child will be a boy?
a)
75%
b)
100%
c)
25%
d)
50%
6.
A physical characteristic that can be passed from parent to offspring.
a)
behavior
b)
trait
c)
strong muscles
d)
ability to fly a plane.
7.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
8.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
9.
In cacti, long arms (A) are dominant to short arms (a). Suppose 2 heterozygous cacti are crossed. What percentage of their offspring are expected to have short arms?
a)
0%
b)
25%
c)
75%
d)
100%
10.
YOU MUST SHOW YOUR WORK ON NOTEBOOK PAPER FOR THIS QUESTION AND TURN IT IN!
Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?
a)
0%
b)
25%
c)
50%
d)
100%
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