WorksheetsGenetics and Heredity Review
Total questions: 25
Worksheet time: 32mins
Name
Class
Date
1.
Who is the Austrian monk who became known as "Father of Genetics" after experimenting on pea plants to discover how heredity works?
a)
Gregor Mendel
b)
James Watson
c)
Rosalind Franklin
d)
Sir Francis Bacon
2.
What is the relationship between two alleles for the same gene in which both alleles are expressed equally in the phenotype of the heterozygote?
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
sex-linked
3.
What occurs when traits are controlled by a gene located on a sex chromosome?
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
sex-linkage
4.
What is the relationship between the alleles for a gene in which one allele is only partly dominant to the other allele resulting in a condition where a heterozygous offspring has a phenotype that is different from but intermediate to the dominant and recessive phenotypes?
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
polygenics
5.
What is it when three or more alleles of the same gene code for a single trait?
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
sex-linked
6.
What is Mendel's first law stating that the two factors controlling a characteristic separates and go to different gametes?
a)
Law of Dominance
b)
Law of Genetics
c)
Law of Independent Assortment
d)
Law of Segregation
7.
What is the functional unit of heredity; a locus on a chromosome that encodes a specific protein or several related proteins?
a)
allele
b)
gene
c)
genotype
d)
phenotype
8.
What are alternate forms of a gene or DNA sequence that occur on either of the two homologous chromosomes in a diploid organism?
a)
allele
b)
gene
c)
genotype
d)
phenotype
9.
What are the alleles an individual inherits at a particular genetic locus?
a)
allele
b)
gene
c)
genotype
d)
phenotype
10.
What is the expression of alleles as an observable physical or biochemical characteristic (trait)?
a)
allele
b)
gene
c)
genotype
d)
phenotype
11.
What occurs when an individual inherits two different alleles for a trait (Bb)?
a)
heterozygous
b)
homozygous
c)
probability
d)
punnett square
12.
What occurs when an individual inherits two alleles of the same trait (bb or BB)?
a)
heterozygous
b)
homozygous
c)
probabilty
d)
punnett square
13.
What is the chart for determining the expected percentages of different genotypes in the offspring of two parents?
a)
heterozygous
b)
homozygous
c)
probability
d)
punnett square
14.
What principle is being shown when an allele masks the presence of another allele for the same gene when they occur together in a heterozygote?
a)
Dominance
b)
Recessive gene
c)
This is not possible
d)
Gene
15.
Which allele is masked by the presence of another allele for the same gene when they occur together in a heterozygote?
a)
Dominant
b)
Recessive gene
c)
This is not possible
d)
Gene
16.
What is an alteration in the DNA structure of sequence of a gene?
a)
DNA replication
b)
chromosomal crossover
c)
gene expression
d)
mutation
17.
What is a disease caused by a mutation in one or a few genes?
a)
codominance
b)
genetic disorder
c)
gene therapy
d)
polygenics
18.
What is the chart that shows relationships and how traits are passed on within a family?
a)
Ancestry diagram
b)
Genetic map
c)
Genome
d)
Pedigree
19.
What type of mutation results in misreading of the code during translation because of a change in the reading frame?
a)
Incomplete mutation
b)
Frameshift mutation
c)
Point mutation
d)
Silent mutation
20.
What is a change in a single base pair of the DNA sequence of a gene?
a)
chromosomal deletion
b)
frameshift mutation
c)
gene amplification
d)
point mutation
21.
In a pedigree chart, what does a shaded circle typically represent?
a)
A carrier male
b)
A carrier female
c)
A female with the trait
d)
A male with the trait
22.
This is a pedigree that traces blue eyes, which is a recessive trait. What is the phenotype of the mother in generation 1?
a)
Brown eyes
b)
Blue eyes
c)
Green eyes
d)
bb
23.
This is a pedigree that traces freckles, which is a dominant trait. What is the genotype of the father in generation 1?
a)
Aa
b)
AA
c)
aa
d)
freckles
24.
What type of inheritance is determined by multiple genes and there can be a range of traits?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
d)
Multiple Alleles
25.
In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R X r ?
a)
male with white eyes
b)
female with red eyes
c)
male with red eyes
d)
female with white eyes
100 %
