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Genetics Review

Total questions: 50

Worksheet time: 2hrs 39mins

Name
Class
Date
1.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
2.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
3.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
4.
Which of the characteristics is a lion least likely to pass on to its offspring?
a)
fur color
b)
length of tail
c)
scars on leg
d)
body size
5.
What type of heredity is shown in the pedigree?
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive 
6.

Dominant alleles are represented by a...

a)

Y chromosome

b)

lowercase letter

c)

recessive trait

d)

capital letter

7.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
(do a Punnett Square)
a)
0 %
b)
25%
c)
50%
d)
75%
8.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
9.

Evan is a tall, 12 year old boy. He has a scar on his right cheek. He is intelligent and an excellent drummer. Which of his traits did he most likely inherit?

a)

height

b)

the scar

c)

his intelligence

d)

ability to play drums

10.
In Mendelian genetics, in a heterozygous genotype, the ___________ allele completely takes over in the phenotype. (= complete dominance)
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
11.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
12.
What usually explains traits that "skip" a generation?
a)
dominant traits
b)
recessive traits
c)
mutations
d)
natural selection
13.
Having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
14.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
15.
This type of inheritance pattern shows BOTH traits in heterozygous offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
sex-linked
16.
Colorblindness is a recessive sex-linked disorder. Cross the parents to figure out which percentage of their offspring will likely be colorblind.
a)
25%
b)
0%
c)
75%
d)
50%
17.
R=round seed
r=wrinkled seed.
Cross a homozygous round pea with a wrinkled pea. Which statement predicts the results?
a)
All offspring will be Rr
b)
25% of offspring will be RR
c)
round seeds will be recessive to wrinkled
d)
Wrinkled will be observed in half of offspring
18.
This type of inheritance pattern is an even BLEND of both traits if heterozygous.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
19.
If the heterozygous shows the dominant phenotype, the inheritance pattern is
a)
complete dominance
b)
co-dominance
c)
incomplete dominance
d)
sex-linked
20.
A person who is heterozygous for a disorder caused by a homozygous recessive allele  _____ affected by the disorder.
a)
will be
b)
will not be
c)
both 
21.
Polygenic means that  _____________________ control a characteristic
a)
many genes
b)
single genes
c)
sex chromosomes
d)
no genes
22.
In a Punnett square each box represents a possible....
a)
offspring
b)
parent
c)
gamete
d)
trait
23.
Red/green color blindness is a recessive trait.  A woman who is a carrier for this allele marries a normal-vision male.  What is the probability that they will have a child who is color blind?
(Punnett square might help!)
a)
25%
b)
50%
c)
75%
d)
0%
24.
If a homozygous red snapdragon and a heterozygous pink snapdragon were crossed - what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
25.

This karyotype could belong to someone with...?

a)

male gender

b)

Down syndrome

c)

Monosomy 18

d)

Trisomy 23

26.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
27.

If a male has an affected X chromosome for a sex-linked trait such as colorblindness, where did he get that X chromosome from?

a)
His father
b)
His mother
28.
If a colorblind male marries a woman who is a carrier, what percentage of their FEMALE children will be colorblind?
a)
0%
b)
25%
c)
50%
d)
100%
29.
In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).  
What is the genotype ratio for a cross between a grey fowl and a white fowl?
a)
2 BB: 2 Bb: 0 bb
b)
0 BB: 4 Bb: 0 bb
c)
0 BB: 2 Bb: 2 bb
d)
1 BB: 2 Bb: 1 bb
30.

Hemophilia is a sex linked trait.  A normal man marries a woman that is a carrier.  What are their chances of having a child with the disorder?

a)
O%
b)
50%
c)
25%
d)
100%
31.

The genotype of the affected son and daughter at the bottom of this pedigree...

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous

d)

Can't tell (AA or Aa)

32.

These bears' offspring have fur patterns that may be due to...

(no that's not really how pandas are made, sadly... pretend)

a)

Medelian inheritance

b)

incomplete dominance

c)

codominance

d)

asexual reproduction

33.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
34.
What is another way of saying "hybrid"?
a)
heterozygous
b)
homozygous dominant
c)
homozygous recessive
d)
none of these choices
35.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
36.
How should you write the genotype of a carrier for a sex-linked trait? 
a)
XAXA
b)
XAXa
c)
XaXa
d)
XAYa
37.
B = brown eyes
b = blue eyes
What is true about two brothers that both have brown eyes if one has genotype BB & the other is Bb?
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
38.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
39.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
40.

What sex has an X and a Y chromosome?

a)

male

b)

female

c)

transgender

d)

all of the above

41.
Colorblindness is more common in males than in females because
a)
Fathers pass the allele for colorblindness to their sons only
b)
The allele for colorblindness is located on the Y chromosome.
c)
It is recessive and located on the X chromosome, & males only get one X.
d)
Males who are colorblind have two copies of the allele for colorblindness.
42.

A red eye dragon mates with a yellow eye dragon. Their offspring have yellow eyes.

This is a case of...

a)

complete dominance (mendelian)

b)

incomplete dominance

c)

codominance

d)

skipping a generation

43.
If a trait occurs on any of the first 22 chromosomes, it is said to be...
a)
autosomal
b)
sex-linked
c)
dominant
d)
a mutation
44.
A trait occurring on chromosome #8 must be...
a)
Autosomal
b)
Sex-linked
c)
Down Syndrome
d)
dominant
45.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
46.
If a mother has Type O blood, and her baby has Type B, which of these is NOT a possible blood genotype of the father?
a)
Type O
b)
Type AB
c)
Type B
homozygous
d)
Type B
heterozygous
47.

Use the gene code chart to translate this mRNA sequence: CUAACC

a)

Leu Thr

b)

Leu Ala

c)

Glu Arg

d)

Glu Ala

48.

If a heterozygous Type A woman has kids with a Type AB man, what are the possible blood types of their kids?

a)

A, B, AB, or O

b)

A or AB

c)

A or B

d)

A, B, or AB

49.

What mRNA sequence would the DNA code GCT ACG transcribe to?

a)

GCT ACG

b)

CGA TGC

c)

CGA UGC

d)

ARG THR

50.

What is the probability of 2 guinea pigs who are both heterozygous for hair color & length having a baby that is white with long hair? (Use dihybrid Punnett image)

a)

1/16

b)

9/16

c)

3/16

d)

8/16

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