WorksheetsGenetics
Total questions: 38
Worksheet time: 2hrs 19mins
Name
Class
Date
1.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
2.
How many alleles (letters) does each person carry for a trait?
a)
1
b)
2
c)
23
d)
46
3.
Dominant alleles are represented by:
a)
An "X" chromosome
b)
A lowercase letter
c)
A recessive trait
d)
A capital letter
4.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
5.
B = brown eyes
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other 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
6.
What ratio of the offspring from the cross shown will be homozygous recessive in the trait for tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
7.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
8.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
9.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
10.
What type of heredity is shown in the pedigree?
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
11.
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?
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?
a)
none
b)
3/4
c)
1/2
d)
all
12.
In humans, skin tone is caused by 3 genes, each with 2 alleles. This is an example of
a)
codominance
b)
incomplete dominance
c)
polygenic inheritance
d)
multiple alleles
13.
In fruit flies eye color is carried on the X chromosome. RED is dominant to WHITE. What is the sex and color of the following: XRXR
a)
female red
b)
female white
c)
male red
d)
male white
14.
In fruit flies eye color is carried on the X chromosome. RED is dominant to WHITE. What is the sex and color of the following: XrY
a)
female red
b)
female white
c)
male red
d)
male white
15.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
16.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
17.
Pea plants can have green or yellow seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele of green seeds. Which of the following terms best describes the allele for yellow seeds?
a)
codominant
b)
recessive
c)
dominant
d)
sex-linked
18.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
(Draw a Punnett Square to answer this question)
(Draw a Punnett Square to answer this question)
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
d)
100% tall
19.
What is a phenotype?
a)
The expression of a trait; physical appearance.
b)
Refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
The passing of traits from parent to offspring
20.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Robert Hooke
c)
Charles Darwin
d)
Anton Von Leeuwenhoek
21.
The scientific study of heredity is ____.
a)
Genetics
b)
Punnett squares
c)
Inheritance
d)
Biology
22.
Which of the following best describes a DNA molecule?
a)
Double helix
b)
Single Helix
c)
Found in non-living things
d)
DNA is in everything on Earth
23.
Having two of the same genes for the trait (TT, tt); Both dominant or both recessive.
a)
homozygous or purebred
b)
heterozygous or hybrid
c)
twin offspring
d)
pairs of chromosomes
24.
Max is a short, 15 year old, Hispanic boy. He has long, thick, black hair which completely covering his arms and legs. He is somewhat intelligent and an mediocre soccer player. Which of his traits did he most likely inherit?
a)
height
b)
his age
c)
his intelligence
d)
ability to play soccer
25.
Blood type is controlled by 3 alleles. What inheritance pattern is this?
a)
multiple alleles
b)
codominance
c)
incomplete dominance
d)
law of dominance
26.
Chickens can have white feathers, black feathers, or an erminette color (blend of black and white feathers). What inheritance pattern is this?
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
law of dominance
27.
How many ATP molecules are produced by AEROBIC respiration?
a)
2
b)
12
c)
24
d)
36
28.
In people, dimples are dominant. If both parents are heterozygous for dimples, what is the probability their child may NOT have dimples?
a)
25%
b)
50%
c)
75%
d)
0%
29.
A red flowered plant (RR) breeds 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%
30.
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
31.
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%
32.
If an intestinal cell in a butterfly contains 24 chromosomes, a butterfly egg would contain
a)
3
b)
6
c)
12
d)
24
33.
Which of the following best explains why the chromosome number is an even number in organisms?
a)
It is only by coincidence, many organisms have an odd number
b)
It isn't, I don't know who told you that, but they were lying.
c)
The number of chromosomes in a none sex cell represents pairs of chromosomes, half from each parent so the number MUST be even.
d)
Chromosomes double every time the cell divides, so after the first division, the number is always even
34.
A human somatic cell usually has _____ total chromosomes.
a)
43
b)
23
c)
26
d)
46
35.
A human gamete usually has _____ total chromosomes.
a)
43
b)
23
c)
26
d)
46
36.
Pea plants can have green or yellow seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele of green seeds. Which of the following terms best describes the allele for yellow seeds?
a)
codominant
b)
recessive
c)
dominant
d)
sex-linked
37.
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
38.
In Genetics, this means the chances of something happening.
a)
Dominance
b)
Possibility
c)
Statistics
d)
Probability
100 %
