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WorksheetsGenetics and Heredity
Total questions: 39
Worksheet time: 8hrs 20mins
Name
Class
Date
1.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
2.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
3.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
4.
A characteristic that an organism can pass on to its offspring through its genes
a)
protein
b)
trait
c)
DNA
d)
gene
5.
This is a part of the chromosome that carries information and controls a trait
a)
trait
b)
gene
c)
chromosome
d)
offspring
6.
What is the type of gene whose effect can be hidden?
a)
dominant gene
b)
inherited trait
c)
recessive gene
d)
acquired trait
7.
An organism with one recessive gene and one dominant gene is called a
a)
gene
b)
recessive gene
c)
hybrid
d)
dominant gene
8.
Having 2 different alleles for a trait (also known as a hybrid)
a)
Heterozygous
b)
Homozygous
9.
Phenotype is the organism's physical appearance while genotype in the organism's genetic makeup
a)
true
b)
False
10.
What is NOT an example of an inherited TRAIT?
a)
eye color
b)
dimples
c)
cleft chin
d)
language
11.
Which type of genotype would result in having blue eyes, if B is dominant for brown eyes?
a)
BB
b)
Bb
c)
bb
12.
What would the genotype be for this Punnett Square? B is dominant for brown hair.
a)
2Bb, 2bb
b)
2BB, 2Bb
c)
1BB, 2Bb, 1bb
d)
4Bb
13.
What would the phenotype be for the offsprings? T is dominant for tall pea plants
a)
50% tall, 50% short
b)
25% tall, 75% short
c)
100% tall, 0% short
d)
75% tall, 25% short
14.
What genotype would a child have to have in order to be left handed? R is dominant for right handed.
a)
rr
b)
Rr
c)
RR
15.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair? Create a punnett square.
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair? Create a punnett square.
a)
0/4
b)
3/4
c)
1/2
d)
4/4
16.
In mussels, the allele for brown coloring (B) is dominant, and the allele for blue coloring(b) is recessive. For which parental genotypes are 100% of the offspring expected to be blue?
a)
BbxBb
b)
bbxbb
c)
BBxbb
d)
BBxBB
17.
In guinea pigs, the alleles for black hair(B) is dominant to the allele for brown hair(b). Two black-haired guinea pigs are crossed. One of the pigs is homozygous for black hair and one is heterozygous. What percentage of their offspring are expected to have black hair? Create a punnett square.
a)
25%
b)
50%
c)
75%
d)
100%
18.
The genotype of an organism describes the
a)
codons that make up the genes
b)
number of gene's on the chromosmes
c)
genetic make-up of a trait
d)
type of chromosomes in the nucleus
19.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
Create a punnett square.
Create a punnett square.
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
20.
R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled by creating a punnett square. Which statement predicts the results?
r=wrinkled seed.
Cross a homozygous round with a wrinkled by creating a punnett square. Which statement predicts the results?
a)
offspring will be Rr
b)
offspring will be RR
c)
round seeds will be recessive to wrinkled
d)
Wrinkled will be observed in half of offspring
21.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
22.
T = tall and t = short
TT and Tt would result in the following phenotype. Create a punnett square to help you.
TT and Tt would result in the following phenotype. Create a punnett square to help you.
a)
short
b)
tall
c)
both tall and short
d)
neither tall or short
23.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
24.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
25.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
Create a punnett square to help you.
Create a punnett square to help you.
a)
0 %
b)
25%
c)
50%
d)
75%
26.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
27.
An allele whose trait always shows up in the organism when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
28.
an organism's appearance or other detectable characteristic
a)
genotype
b)
phenotype
c)
genetics
d)
heterozygous
29.
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
30.
Based only on the sex chromosomes in typical human egg and sperm cells at fertilization, the probability of producing a female is
a)
25%
b)
50%
c)
75%
d)
90%
31.
one of the alternative forms of a gene that governs a characteristic, such as hair color
a)
allele
b)
gene
c)
trait
d)
DNA
32.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
33.
What is an example of an inherited TRAIT?
a)
speaking English
b)
building a nest
c)
tallness in plants
d)
making a sandwich
34.
A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
35.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
36.
A tall plant (TT) is crossed with a short plant (SS) and a medium plant (TS) results. This is what type of inheritance pattern?
a)
Incomplete Dominance
b)
Codominance
37.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
38.
How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?
a)
There is no difference
b)
The heterozygous genotype has a unique phenotype
c)
There is no heterozygous genotype
d)
There is only one phenotype regardless of genotype.
39.
If you cross a black chicken with a white chicken, only checkered chickens would be produced. What kind of inheritance pattern does this follow?
a)
incomplete Dominance
b)
Co-Dominance
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