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Mendelian Genetics

Total questions: 40

Worksheet time: 40mins

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.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
4.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
5.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
6.
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
7.
Which of the following best describes a GENOTYPE?
a)
The allele/genetic makeup of an organism.
b)
The physical expression of a trait.
8.
Which of the following is an example of a heterozygous genotype?
a)
RR
b)
Rr
c)
rr
9.
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.
10.

What is the predicted percentage of homozygous recessive offspring in this cross?

a)

0%

b)

25%

c)

50%

d)

75%

11.
The dominant trait in this punnett square is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
12.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
13.

A feature regulated by a set of genes (allele) passed on

from parents to offspring. Also called inherited traits.

a)

Heterozygous

b)

Mendel

c)

Chromosome

d)

Traits

14.

Passing on traits from parents to offspring

a)

Chromosome

b)

Genotype

c)

Heredity

d)

Allele

15.

The study of heredity

a)

Genetics

b)

Genome

c)

Allele

d)

Punnett Square

16.

The instructions of this allele are covered up by the other allele in a homologous pair. Symbolized by a small letter.

a)

Homozygous

b)

Dominant

c)

Recessive

d)

Genetics

17.

The instruction of one allele covers up the instruction

of the other allele in a homologous pair. Symbolized by a capital letter.

a)

Recessive Allele

b)

Dominant Allele

c)

Heredity

d)

Trait

18.

The letter symbols for both homologous alleles.

BB Bb bb AA Aa aa

a)

Genotype

b)

Phenotype

c)

Recessive

d)

Dominant

19.

A genotype where only dominant alleles were passed on

from both parents for one trait

BB AA TT LL

a)

Homozygous Recessive

b)

Homozygous Dominant

c)

Dihybrid

d)

Heredity

20.

The observable traits dictated by the genotype

a)

Phenotype

b)

Genotype

c)

Homozygous Recessive

d)

Homozygous Dominant

21.

The genetic cross between two parents for one trait:

Example BB x bb

B = dominant for brown

b = recessive for blue

a)

Incomplete Dominance

b)

Dihybrid Cross

c)

Monohybrid Cross

d)

Iron Cross

22.

The ratio of homozygous dominant to heterozygous

to homozygous recessive offspring

a)

Genotypic Ratio

b)

Phenotypic Ratio

c)

Monohybrid Cross

d)

Homologous Pair

23.

The ratio of phenotypes in a Punnett Square

a)

Phenotypic Ratio

b)

Genotypic Ratio

c)

Dihybrid Cross

d)

Independent Assortment

24.

The chance that a genotype or phenotype

will actually occur in offspring

a)

Probability

b)

Phenotype

c)

Genotype

d)

Homozygous Recessive

25.

The Italian monk/scientist who first showed

the principles of genetics

a)

Watson and Crick

b)

Linnaeus

c)

Darwin

d)

Mendel

26.
Which of the following is a heterozygous dominant genotype? 
a)
GG
b)
gg
c)
GGG
d)
Gg
27.
Dominant alleles are represented by a(n)
a)
phenotype
b)
lower case letter
c)
upper case letter
d)
punnett square 
28.
True or False:
A heterozygous dominant trait can be written as BB.
a)
True
b)
False
29.
D = dimples        d = no dimples 
What is the genotype for a homozygous recessive offspring?
a)
DD
b)
Dd
c)
dd
30.
Round (R) seeds are dominant to wrinkled (r) seeds.
What is the genotype for a homozygous dominant offspring?
a)
RR
b)
Rr
c)
rr
31.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
32.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
33.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
34.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
35.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
BB
36.
What is the diploid number in human cells?
a)
2
b)
23
c)
46
d)
92
37.
What is the result of meiosis?
a)
2 daughter cells that are haploid and genetically different
b)
2 daughter cells that are haploid & identical
c)
4 daughter cells that are diploid & genetically different
d)
4 daughter cells that are haploid & genetically different 
38.
What did Gregor Mendel use to discover the principles that rule heredity?
a)
Pea Plant
b)
Pigeons
c)
Pear trees
d)
Photosynthesis
39.
Gregor Mendel is known as the father of _________
a)
Modern Medicine
b)
Father of the Green Revolution
c)
Father of Genetics
d)
The Pea Plant Man
40.
What do we call the table used to calculate the probability of an offspring's genotype?
a)
Punnett square
b)
Venn diagram
c)
Golden ratio
d)
Fibonacci sequence

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