WorksheetsMendelian Genetics Review!
Total questions: 25
Worksheet time: 17mins
Name
Class
Date
1.
What did Mendel call the two kinds of traits exhibited by the pea plants (one coming from the father, one from the mother)?
a)
Genesis
b)
Elective traits
c)
Alleles
d)
Quadrants
2.
What do we call the result of the genotype (for example, the color of the peas)?
a)
Visible traits
b)
Physiotrait
c)
Genotype 2
d)
Phenotype
3.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
4.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
5.
A __________ is a segment of DNA that codes for a particular protein, which leads to a particular trait.
a)
Gene
b)
Allele
c)
Codon
d)
Nucleotide
6.
Which of the following best describes a GENOTYPE?
a)
The allele/genetic makeup of an organism.
b)
The physical expression of a trait.
7.
The letters on the TOP AND SIDE of a punnett square represent ______________.
a)
The combination of alleles in offspring.
b)
The possible alleles given by the parents following meiosis.
c)
The genotype and phenotype of offspring.
d)
The results of genetic mutations in offspring.
8.
What is the predicted percentage of homozygous recessive offspring in this cross?
a)
0%
b)
25%
c)
50%
d)
75%
9.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
10.
Why do we see only tall plants in the second generation?
a)
The gene for tall height is dominant
b)
The gene for short height is dominant
c)
The gene for tall height is recessive
d)
The parents did not have the tall gene
11.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
12.
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
13.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
14.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
15.
When you cross a true-breeding yellow seed plant with true-breeding green seed plant, and all of the resulting offspring are green seed plants, this means
a)
the allele for green seed plants is dominant
b)
the allele for yellow seed plants is dominant
c)
the allele for green seed plants is recessive
d)
they are homozygous like their parents
16.
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
17.
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
18.
The law that states that the inheritance of one trait has no effect on the inheritance of another is
a)
the law of independent assortment
b)
the law of dominance
c)
the law of segregation
19.
What is the genotypic ratio in this cross?
R= round r= wrinkled
R= round r= wrinkled
a)
3:1 (3 round to 1 wrinkled)
b)
1:2:1 (1 RR, 2 Rr, 1 rr)
c)
75% round, 25% wrinkled
d)
1:3 (1 round to 3 wrinkled)
20.
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
21.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
22.
One difference between DNA and RNA is that....
a)
Only RNA has the base Uracil
b)
only RNA contains the base Thymine
c)
only RNA contains the base Cytocine
d)
only RNA contained the base Guanine
23.
True or false: RNA is double-stranded.
a)
true
b)
false
c)
it depends on the type
24.
A triplet of mRNA is called a
a)
codon
b)
anticodon
c)
amino acid
d)
peptide bond
25.
_______ is made during transcription and ________ is made during translation.
a)
mRNA / a protein
b)
a protein / mRNA
c)
Ribosome / Nucleus
d)
mRNA / tRNA
100 %
