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WorksheetsGenetics
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Which of the following statements would be an accurate description of Mendel’s Laws of Segregation?
a)
Allele pairs separate from each other when gametes are formed
b)
Organisms inherit 2 copies of each gene, one from each parent
c)
Only one copy of a gene goes into an egg or sperm
d)
All are correct
2.
Two men believe they are the father of a child whose blood type is O. The child’s mother is type B. One man has blood type A; the other has blood type AB. Which man could be the father?
a)
The man with blood type A
b)
The man with blood type AB
c)
Neither man could be the father
d)
Both men could be the father
3.
A gardener crossed a plant with red flowers with a plant that had white flowers. The offspring plants had pink flowers. What is the most likely genetic reason for these differences in color?
a)
co-dominance
b)
recessive pink genes
c)
polygenic inheritance
d)
incomplete dominance
4.
How can you recognize the heterozygote in an incomplete dominance pattern of heredity?
a)
Both alleles are expressed completely
b)
The phenotype is somewhere between the phenotypes of the two homozygotes.
c)
Heterozygotes are all males
d)
Heterozygotes are all females
5.
Why are there so many phenotypes in polygenic inheritance?
a)
There are many alleles for each gene
b)
Many genes for the same trait interact to produce a continuous range of phenotypes.
c)
All alleles are dominant
d)
All alleles are recessive
6.
Albinism is characterized by a lack of pigment in skin, hair, and eyes, caused by the interference with the expression of other genes. This example showcases
a)
Incomplete dominance
b)
Polygenic Inheritance
c)
Co-dominace
d)
Epistasis
7.
How are the X and Y chromosomes different?
a)
The Y chromosome is larger than the X
b)
The X chromosome has many genes that affect various traits.
c)
The X chromosome has genes for development of male offspring.
d)
The Y chromosome has many more genes present than the X chromosome.
8.
In a dihybrid cross between parent 1 (AaBbCC) and parent 2 (AAbbCc), how many different gametes can be produced from the AaBbCC parent?
a)
2
b)
4
c)
6
d)
8
9.
For an XX female to express a recessive sex-linked trait, she must have
a)
a Y chromosome
b)
an inactivated allele
c)
two recessive alleles
d)
two dominant alleles
10.
What is the main reason that sex-linked disorders are most observed in males?
a)
The X chromosome only has genes for genetic disorders.
b)
The Y chromosome cannot have genes that cause genetic disorders.
c)
The Y chromosome cannot mask alleles on the X chromosome.
d)
The X chromosome has genes only for sex determination.
11.
A female is born with attached earlobes, which is a recessive phenotype. Which of the following genotypes could her parents have?
a)
RR and RR
b)
Rr and RR
c)
Rr and rr
d)
RR and rr
12.
One reason for Mendel's success with genetic studies of garden peas was that he
a)
used only hybrid pea plants
b)
used peas with large chromosomes
c)
studied large numbers of offspring
d)
discovered the source of variation in peas
13.
Which genetic concept was proposed by Mendel?
a)
Chromosome non-disjunction
b)
Independent Assortment
c)
Multiple Alleles
d)
Sex linkage
14.
Traits that are controlled by genes found on an X-chromosome are said to be
a)
autosomal dominant
b)
autosomal recessive
c)
codominant
d)
sex-linked
15.
While working with pea plants, Gregor Mendel observed that some tall plants had yellow seeds while other tall plants had green seeds. This observation is best explained by
a)
Non-Disjunction of chromosomes
b)
Linkage of Genes
c)
Independent Assortment
d)
Intermediate Inheritance
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