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WorksheetsGenetics Chapter 6 Matters of Sex Review
Total questions: 26
Worksheet time: 15mins
Name
Class
Date
1.
Is the pedigree pictured X-linked dominant or X-Linked Recessive.
a)
X- linked dominant
b)
X - Linked Recessive
2.
At what stage of development are gonads or non-specific sex organs formed?
a)
during the 9th week of prenatal development
b)
during the 5th week of prenatal development
c)
during the first week of prenatal development
d)
at fertilization
3.
If this couple has a child, what are the odds that a SON will be colorblind (hint: has a little "c")?
a)
50%
b)
25%
c)
100%
d)
75%
4.
Hemophilia is recessive diseases carried on the X chromosome. Can a male be a carrier of the disease?
a)
Yes
b)
No
c)
Maybe
5.
Having a Y chromosome always makes someone male...
a)
True
b)
False
6.
The SRY gene codes primarily for...
a)
female traits
b)
male traits
c)
autosomal traits in both sexes
d)
sex linked traits in both sexes
7.
What regions of the Y-chromosome carry information that can be crossed over with the X?
a)
SRY
b)
PAR1 and PAR2
c)
PRY
d)
CDY
8.
The female specific reproductive ducts are known as...
a)
Mullerian structures
b)
Wolffian structures
c)
sex organs
d)
Uterine Organs
9.
What is the default gender we all start off as?
a)
Male
b)
Female
10.
What is the heterogametic sex in humans?
a)
male
b)
female
11.
5% of the Y chromosome
a)
is found in the SRY gene
b)
contains information that codes for maleness
c)
contains DNA that can crossover with the X chromosome
d)
codes for bone development
12.
X chromosomes contain approximately ________ genes to a Y chromosomes 231 genes.
a)
130
b)
200
c)
1500
d)
10,000
13.
The presence of both male and female structures in an individual is known as...
a)
abnormal
b)
intersex
c)
transvestism
d)
androgen insensitivity syndrome
14.
Can homosexuality be linked to one single gene?
a)
Yes
b)
No
15.
The proportion of males to females in a human population is known as ___________.
a)
population ratio
b)
population density
c)
genetic drift
d)
sex ratio
16.
X-linked genes in males are known as __________ b/c males have 1 X not 2.
a)
heterozygous
b)
homozygous
c)
hemizygous
d)
homogametic
17.
The pedigree below shows what mode of inheritance?
a)
X-linked recessive
b)
X-linked dominant
c)
Autosomal dominant
d)
Autosomal recessive
18.
Why is X-inactivation necessary?
a)
to allow fmales to express there traits
b)
to balance the number of genes expressed on the X chromosome
c)
to prevent disease
d)
to make calico cats
19.
Inactive X's show up as dark spots in this picture these are called...
a)
Inactives
b)
X-Spots
c)
Basal Nuclei
d)
Barr Bodies
20.
The picture below is an example of...
a)
an Imprinting Disorder
b)
A sex limited trait
c)
manifesting heterozygote
d)
A Sex Influenced Trait
21.
Beard growth is a(n) ______________________
a)
Sex limited disorder - only appears in men.
b)
It is on a gene turned on in men and off in women.
c)
It is an X-linked trait.
d)
Sex influenced disorder - is dominant in females and recessive in males
22.
During genomic imprinting what causes certain genes to be turned on or off?
a)
Whether a trait is dominant or recessive.
b)
Whether a gene appears on the X or Y chromosome
c)
Whether a methyl group covers up a gene site or not.
d)
All of the above
23.
In genomic imprinting what can be affected by which parent you inherited a disease from?
a)
If it is sex linked or autosomal
b)
Whether its found on the X or Y chromosome.
c)
Whether you display the disease or just carry it
d)
Disease severity and phenotype.
24.
The image shows the trait for sperm production being passed on, what type of inheritance is this?
a)
X-linked
b)
Y-linked
c)
Autosomal Dom
d)
Autosomal Rec.
25.
What type of inheritance is in the pedigree?
a)
X-linked dominant
b)
X-linked recessive
c)
Y-linked dominant
d)
Y-linked recessive
26.
Is the disease shown in the picture sex linked?
a)
Yes
b)
No
c)
Maybe
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