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Genetics Review Part 2

Total questions: 22

Worksheet time: 13mins

Name
Class
Date
1.

What gender is individual 3 in generation II?

a)

male

b)

female

2.
Mendel said that one trait doesn't depend on another. What law is that?
a)
Law of Dominance
b)
Law of Independent Assortment
c)
Law of Segregation
d)
Law of Universal Inheritance
3.
The law of segragration states…
a)
alleles separate during meiosis
b)
different alleles can never be found in the same organism
c)
each gene ends up in a different gamete
d)
each gene is found on a different molecule of DNA
4.
Which example best illustrates Mendel's Law of Indpendent Assortment?
a)
2 short haired cats produce 1 long-haired cat and 3 short-haired cats
b)
A color blind man &normal vision woman produce a normal vision son & color blind daughter
c)
A tall purple flower and short white flower produce tall white flowers
d)
A red snapdragon and white snapdragon produce offspring with a pink flower
5.
Why do offspring look similar to, but not exactly the same, as their parents?
a)
The offspring have genetic material from both mother and father
b)
The cells of the offspring undergo mitosis many times as the offspring grow and develop.
c)
The cells of the offsring contain all the dominant genes from the parents.
d)
The offspring have a period of embryonic development, rather than being born immediately after fertilization.
6.
Which of the following statements is true of heterozygous alleles?
a)
They are identical genes at the same locus on sister chromatids.
b)
They are different forms of the same gene on homologous chromosomes
c)
They are more likely than homozygous alleles to cross over.
d)
They are more likely to cause genetic disorders than homozygous alleles.
7.
When is a recessive allele expressed in offspring?
a)
When 2 copies are present
b)
when parents have no dominant alleles
c)
when the offspring is heterozygous
d)
when the offspring is homozygous
8.
Organisms that have two identical alleles for a particular trait are said to be
a)
hybrid
b)
homozygous
c)
heterozygous
d)
dominant
9.

Which of the following traits is controlled by multiple alleles in humans?

a)

sickle cell anemia

b)

blood type

c)

hemophilia

d)

pattern baldness

10.
Pigmented skin is dominant to albinism. What is the genotype of an individual with albinism.
a)
carrier
b)
heterozygous
c)
homozygous dominant
d)
homozygous recessive
11.
A plant has 1 dark green allele and one yellow allele but the phenotype is dark green leaves.
a)
This means yellow is dominant to green.
b)
This means green and yellow are codominant
c)
This means that green is dominant to yellow
d)
This means that green is incompletely dominant to yellow.
12.
A white cow and red cow produce a calf with red and white hair.
a)
The red and white alleles are sex-linked
b)
The red and white alleles are are codominant
c)
The red allele is recessive to the white allele
d)
The red allele is dominant to the white allele.
13.
The region of DNA that codes for a particular trait is called a(n)
a)
gene
b)
geneotype
c)
chromosome
d)
chromatid
14.
Hair color and eye color are examples of a person's
a)
recessive traits
b)
dominant traits
c)
phenotype
d)
genotype
15.
What is the phenotypic ratio between 2 heterozygous parents?
a)
3 to 1
b)
1 to 2 to 1
c)
9 to 3 to 3 to 1
d)
1 to 2 to 2 to 1
16.

Chromosomes in position #6 are called?

a)

gametes

b)

sex-linked

c)

autosomal

d)

regular

17.

What is the genotype of individuals 3 and 4?

a)

TT

b)

Tt

c)

tt

d)

TT or Tt

18.

Epistasis in a non-Mendelian rule breaker. What law does it break?

a)

Law of Independent Assortment

b)

Law of Universal Inheritance

c)

Law of Dominance

d)

Law of Separation

19.

2 golden horse produce 1 white horse, 1 brown horse, and 2 golden horses. What does this say about coat color?

a)

Golden coat color is recessive

b)

Golden coat color is dominant

c)

Coat color is an incompletely dominant trait.

d)

Coat color is sex-linked

20.

What can a karyotype determine

a)

eye color

b)

gender

c)

extra/missing chromosomes or mutations

d)

both 2 and 3

21.

Based on this karyotype, this person is ____ and has a(n) ____ disorder.

a)

male, sex-linked

b)

female, sex-linked

c)

male, autosomal

d)

female, autosomal

22.

Humans have _____ autosomal chromosomes and ____ sex chromosomes (gametes).

a)

21, 1

b)

22, 1

c)

44, 2

d)

45, 1

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