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Genetics
Test Description: Unit 5
Instructions: Answer all questions to get your test result.
1) Which of the following are all the possible offspring genotypes for a cross between a homozygous dominant mom and a homozygous recessive dad?
A
homozygous dominant and heterozygous
B
Heterozygous and homozygous dominant
C
Heterozygous
D
homozygous dominant and homozygous recessive
2) What is a phenotype?
A
Genes of an organism
B
Sperm and Egg
C
genotype
D
The physical appearance of an organism
3) What are the gametes of a plant that is Homozygous dominant for height and Heterozygous for Purple petals
A
HHPp
B
Hp, HP, HP, HP
C
HP, hP, Hp, hp
D
HP, HP, Hp, Hp
4) Yellow is dominant to pink. If a person has a Yy genotype what would be their phenotype?
A
Yellow
B
Heterozygous
C
Pink and yellow
D
Pink
5) Which of the following is the the alleles in the genotype Heterozygous?
A
yy
B
yellow
C
HH
D
Gg
6) If P means no freckles and p means freckles... which kid below would have freckles
A
PP
B
pp
C
Pp
D
None of the kids have freckles
7) If Dad Tt had a child with mom Tt what percent of their children will be short (tt)
A
50%
B
75%
C
100%
D
25%
8) Which of the following represents a purebred trait?
A
Hh
B
bb
C
Hybrid
D
Bb
9) Fluffy fur is a dominant trait in guinea pigs. Two fluffy guinea pigs have a non-fluffy offspring. What must be the genotypes of the parents?
A
Aa and Aa
B
AA and AA
C
AA and Aa
D
aa and AA
10) The probability of a human couple having a male child is
A
50%
B
46%
C
75%
D
100%
11) Having more than 5 fingers (Polydactyly) is a dominant trait. What is the probability that two people, each of which have 5 fingers per limb,will have a 6-fingered child?
A
100%
B
0%
C
25%
D
50%
12) Which of the following shows chromosome 23 for a female?
A
Aa
B
XX
C
XY
D
XYY
13) A family tree diagram that is used to track traits through several generations is known as a
A
Genotype
B
Pedigree
C
Cladogram
D
Karyotype
14) When a cell receives too many or too few chromosomes during meiosis, ____ has occurred
A
Nondisjunction
B
Gametes
C
Mitosis
D
Translocation
15) Sex-linked traits are
A
Found more often in males
B
On the Y Chromosome
C
Carried only by males
D
Only found in females
16) The passing of traits from one generation to the next is ____.
A
Evolution
B
Genotype
C
Heredity
D
Karyotypes
17) During ____, alleles separate into different sex cells
A
Mitosis
B
Meiosis
C
Translocation
D
Fertilization
18) Which of the following is the product of meiosis?
A
zygote
B
Heart cell
C
gamete
D
somatic cell
19) The purpose of crossing over during meiosis is
A
to create an identical daughter cell
B
to decrease diversity
C
to increase genetic variation
D
to ensure all offspring all males
20) An organism goes through meiosis and one of the gametes has a mutation, who would receive this mutation?
A
The brother of the organisms
B
The offspring of the organism
C
The organism
D
The parent of the organism
*select an answer for all questions
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