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Inherited Traits/Punnett Squares Practice
Test Description: Review questions about DNA, inherited traits, and punnett squares.
Instructions: Answer all questions to get your test result.
1) How many chromosomes are present in a human cell nucleus?
A
46 chromosomes or 23 pairs
B
32 chromosomes or 16 pairs
C
23 chromosomes or 46 pairs
D
46 pairs or 92 chromosomes
2) Molecule that carries genetic instructions for all living organisms.
A
Nucleus
B
Chromosomes
C
Genes
D
DNA
3) A stretch of DNA with instructions for one trait.
A
Gene
B
DNA
C
Nucleus
D
Chromosome
4) The transfer of traits from one generation to the next.
A
heredity
B
Recessive trait
C
acquired trait
D
dominant trait
5) This is the Father of Modern Genetics.
A
James Watson
B
Francis Crick
C
Gregor Mendel
D
Charles Darwin
6) Traits that hide other traits when passed on to an offspring.
A
dominant trait
B
inherited traits
C
acquired trait
D
recessive trait
7) Shows its specific trait when both parents pass the gene to the child. (Need 2 to show up)
A
dominant traits
B
recessive traits
C
inherited traits
D
acquired traits
8) the physical traits of a person
A
phenotype
B
genotype
C
allele
D
DNA
9) On a Punnett Square two capital letters indicate a gene which is...?
A
homozygous dominant
B
homozygous recessive
C
none of the above
D
heterozygous
10) On a Punnett Square one lower case letter and one capital letter indicate a gene which is
A
heterozygous
B
homozygous recessive
C
homozygous dominant
D
none of the above
11) Choose the genotype that is homozygous.
A
Dd
B
Mm
C
TT
D
Tt
12) When completing a Punnett Square, where are the genotypes of the parents?
A
in the boxes
B
on the top and side
C
on one side
D
nowhere
13) When completing a Punnett Square, where do we put the genotypes of the offspring?
A
on the top and side
B
nowhere
C
inside the boxes
D
on one side
14) If a person has the genotype, Yy, which trait do we see? (Y=Yellow, y=blue).
A
yellow, since it is the dominant trait
B
blue, since it is the dominant trait
C
blue, since it is the recessive trait
D
yellow, since it is the recessive trait
15) Two parents have a heterozygous genotype (Bb) for eye color. The dominant allele (B) codes for brown eyes, while the recessive allele (b) codes for blue eyes. What is the chance of having a blue eye baby?
A
75%
B
50%
C
100%
D
25%
16) In dogs, the dominant allele (F) codes for grey fur and the recessive allele (f) codes for black fur. If you cross a female dog that is heterozygous and a male dog that is homozygous recessive, what % of the offspring will have grey fur?
A
75%
B
50%
C
100%
D
25%
17) What % of the offspring will have black fur if you cross a female dog with black fur (ff) with a male dog with black fur (ff)?
A
25%
B
100%
C
50%
D
75%
18) In dogs, deafness is caused by a recessive gene (d). A male dog named Gilbert, can hear (DD). If we bred Gilbert with a dog that was deaf. What % of the offspring would also be deaf?
A
75%
B
0%
C
50%
D
25%
19) A homozygous recessive short tailed cat (Tt) is bred with a heterozygous long tailed cat (Tt), what % of the offspring will have short tails and what % will have long tails?
A
25% short tails, 75% long tails
B
0% short tails, 100% long tails
C
75% short tails, 25% long tails
D
50% short tails, 50% long tails
20) Albino color in mice is a recessive trait, while brown color is dominant. If you cross a homozygous recessive albino mouse with a homozygous dominant brown mouse, what % of the offspring will be albino and what % will be brown?
A
75% albino, 25% brown
B
50% albino, 50% brown
C
0% albino, 100% brown
D
25% albino, 75% brown
*select an answer for all questions
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