lecture 13 practice questions Flashcards
the location of a specific gene on a specific chromosome is called
a. Genetics
b. Genome
c. Locus
d. Allele
locus
Which of the following is NOT true about alleles?
a. Alleles are alternative forms of the same gene
b. We always have 2 different alleles coding for each trait
c. We inherit one allele from each parent
d. Each diploid cell carries 2 alleles for every gene
e. Each haploid cell carries 1 of allele for every gene
each diploid cell carries 2 alleles for every gene
Homozygous genotype is:
a. When you inherit two alleles that are the same
b. When you inherit two different alleles from different parents
c. When you inherit one kind of allele from one parent and another kind
from another parent
d. When two alleles code for alternative versions of the same trait
when you inherit two alleles that are the same
If “X” is the dominant allele, and “x” is the recessive allele coding for trait X, then which of the following is true:
a. “XX” is considered a Homozygous recessive genotype
b. ”xx” is considered Homozygous dominant genotype
c. “Xx” is considered a Heterozygous dominant genotype
d. “Xx” is considered Heterozygous recessive genotype
e. “Xx” is considered the Heterozygous genotype
Xx is considered the. heterozygous genotype
There are two types of earlobes people have: attached on the bottom and
free-hanging detached. The free-hanging earlobe is coded by a dominant
allele E. The attached earlobe is a recessive trait and is coded by recessive
allele e.
I. Homozygous dominant genotype will be:
a. EE
b. Ee
c. eE
d. ee
II. If someone has attached earlobes, you can guess that their genotype
is:
a. EE
b. Ee
c. eE
d. ee
I. EE
ll. ee
- Someone with genotype Ee will have:
a. Attached earlobes
b. Detached earlobes
detached
- If mom’s genotype is Aa and dad’s genotype is Aa, then the possible outcomes for children will be:
a. Aa, Aa, Aa, Aa
b. AA, AA, aa, aa
c. AA, Aa, Aa, aa
d. AA, AA, AA, AA
e. aa, aa, aa, aa
c. AA, Aa, Aa, aa
Mom has attached earlobes, and dad has detached earlobes. Knowing that dad has a heterozygous genotype, figure
out both mom’s and dad’s genotypes
Remember: e = recessive, attached earlobes; E = dominant = detached
earlobes. The possible offspring outcomes here will be:
a. EE, EE, EE, EE
b. EE, EE, ee, ee
c. Ee, Ee, Ee, Ee
d. EE, Ee, Ee, ee
e. Ee, Ee, ee, ee
e. Ee, Ee, ee, ee
If both parents have detached earlobes, and both are heterozygous, then
the possible offspring outcomes will be:
a. EE, EE, EE, EE
b. EE, EE, ee, ee
c. Ee, Ee, Ee, Ee
d. EE, Ee, Ee, ee
e. Ee, Ee, ee, ee
d. EE, Ee, Ee, ee
If one parent is homozygous dominant, and the other is homozygous
recessive, then the possible offspring outcomes will be:
a. EE, EE, EE, EE
b. EE, EE, ee, ee
c. Ee, Ee, Ee, Ee
d. EE, Ee, Ee, ee
e. Ee, Ee, ee, ee
c. Ee, Ee, Ee, Ee
Mom is homozygous recessive and dad is homozygous dominant. What is
the % chance of them having a blue-eyed baby?
0%
Both parents are heterozygous. What are their eye colors? What is the
percent chance of them having a blue-eyed baby?
25%
Mom has brown eyes, dad has blue eyes, baby has blue eyes. Question:
What is everyone’s genotype?
Bb bb –>
Bb, Bb, bb, bb
Mom is homozygous healthy, and dad is hemophilic. What is the % chance
of having a hemophilic baby?
0%
Mom is hemophilic, and dad is normal. What is the % chance of having a
hemophilic baby?
50%
If mom is heterozygous healthy for the hemophilia gene, what does it
mean?
a. She has a genotype of XhXn
b. She is a carrier of a bad allele
c. If she has a son with a healthy man, there is 50% chance that he will
have the disease
d. If she has a daughter with a healthy man, the daughter will be healthy
e. All of the above
e. all of the above
For a man with hemophilia, his genotype will be:
a. XnYh
b. XhYh
c. XhY
d. XnY
e. XhYn
c. XhY
A woman with hemophilia will have this genotype:
a. XhXn
b. XhXh
c. XhYh
d. XnYh
e. XhY
b. XhXh
If a healthy homozygous woman and a hemophilic man have a baby, what is the % chance of them having a hemophilic baby? (remember, you have to do this in 2 steps)
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
0%
If a woman with hemophilia and a healthy man have a baby, what is the %
chance for them to have a hemophilic baby?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
50%
Someone with blood type A could have these genotypes:
a. AA only
b. AO only
c. AA or AO
d. OO
e. AB, AO, or AA
c. AA or Ao
Heterozygous dominant genotype will result in this blood type:
a. Type A
b. Type B
c. Type AB
d. Type O
c. Type AB
Homozygous dominant with blood type B could have these genotypes:
a. BB only
b. OB only
c. AB only
d. BB, AB, or OB
e. OB or BB
a. BB only
Use Punnett’s square to figure out the following: if mom has blood type AB
and dad has blood type O, what is the % chance for them to have a blood
type O baby?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
0%
Same parents as in question 4: what is the % chance for them to have a
blood type A baby?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
c. 50%
If mom is Heterozygous with blood type B, her genotype would be:
a. AB
b. BO
c. BB
d. OO
b. BO
If a heterozygous mom with blood type B and a heterozygous dad with blood type A have a baby, what is the % chance for them to have a blood type O baby?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
b. 25%
The inner-most layer of the eye ball is:
a. Choroid
b. Vitreous body
c. Sclera
d. Cornea
e. Retina
e. Retina
The function of the Macula is:
a. To be used for side vision
b. To produce colorless images
c. To produce high-resolution images
d. To be used at night
e. To control the amount of light that reaches retina
c.to produce high-resolution images
The following is NOT true about retinal cones:
a. They produce sharp images, when excited
b. They are used in bright light
c. They are used for perception of colors
d. They need Retinol to work
e. They are less numerous than the rods
d. they need retinol to work
The function of the ciliary muscles is:
a. To move the eye ball
b. To constrict the pupil
c. To dilate the pupil
d. To change the shape of the crystalline lens
e. To move the aqueous humor
d. to change the shape of the crystalline lens
The part of the eye that maintains the shape of the eye ball is called:
a. Aqueous humor
b. Vitreous body
c. Choroid
d. Crystalline lens
e. Retina
b. vitreous body
The following muscles rotate the eye ball
a. Iris muscles
b. Ciliary muscles
c. Extrinsic muscles
d. All of these
e. None of these
c. extrinsic muscles
The thin, film-like membrane that covers the front of the eye is called:
a. Sclera
b. Cornea
c. Conjunctiva
d. Choroid
e. Aqueous humor
c. conjunctiva
Fovea is found in the center of:
a. Macula
b. Lens
c. Iris
d. Pupil
e. None of these
macula
