Genetics Practice Quiz: Trivia Test!
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Genetics is the study of how different traits such as hair color and texture, eye color, and disease risk are passed down or inherited from parent to offspring. Genetics helps to clarify what makes you unique as an individual. This quiz asks questions like who is considered the father of genetics, what does homozygous recessive genotype mean, and what happens to a chromosome during meiosis. Make sure you take your certificate after the quiz.
Questions and Answers
- 1.
Who is considered the "Father of Genetics"?
- A.
Gregor Mendel
- B.
Charles Darwin
- C.
Steve Jobs
- D.
Francis Crick
Correct Answer
A. Gregor MendelExplanation
Gregor Mendel discovered many principles of heredity in the 1800s by working with pea plants.Rate this question:
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- 2.
Which of the following is a homozygous recessive genotype?
- A.
TT
- B.
Tt
- C.
Tt
Correct Answer
C. TtExplanation
Homozygous refers to the fact that both alleles are the same and recessive tells us that the alleles are represented by lower case letters.Rate this question:
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- 3.
Which of the following is a homozygous dominant genotype?
- A.
TT
- B.
Tt
- C.
tt
Correct Answer
A. TTExplanation
Homozygous indicates that the alleles are the same and dominant tells us that the alleles are represented by capital letters.Rate this question:
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- 4.
Which of the following is a heterozygous genotype?
- A.
TT
- B.
Tt
- C.
Tt
Correct Answer
B. TtExplanation
Heterozygous means different or one of each type of allele: dominant and recessive.Rate this question:
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- 5.
What happens to the chromosome number during meiosis?
- A.
It doubles.
- B.
It stays the same.
- C.
It halves.
- D.
It quadruples.
Correct Answer
C. It halves.Explanation
Meiosis cuts the number of chromosomes in the parent cell in half to produce two haploid cells.Rate this question:
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- 6.
A diploid cell has _____ set(s) of homologous chromosomes.
- A.
One
- B.
Two
- C.
Three
- D.
Four
Correct Answer
B. TwoExplanation
Di means two so the word diploid means two sets of chromosomes. Diploid cells are produced during mitosis.Rate this question:
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- 7.
A haploid cell has _______ set(s) of chromosomes.
- A.
One
- B.
Two
- C.
Three
- D.
Four
Correct Answer
A. OneExplanation
Ha refers to half so a haploid cell contains only one set of chromosomes. Gametes are haploid cells.Rate this question:
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- 8.
The possible form of a gene is called a(n) _____________.
- A.
Trait
- B.
Gamete
- C.
Hybrid
- D.
Allele
Correct Answer
D. AlleleExplanation
Mendel dubbed the different forms of gene alleles. In a monohybrid cross, the two alleles are dominant and recessive.Rate this question:
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- 9.
Haploid cells are formed during the process of ____________.
- A.
Mitosis
- B.
Meiosis
- C.
Fertilization
- D.
Nondisjunction
Correct Answer
B. MeiosisExplanation
Meiosis produces gametes which are haploid cells so that when a male and a female gamete meet in the process of fertilization the resulting zygote has the full number of chromosomes to produce a healthy individual.Rate this question:
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- 10.
Another name for haploid cells are _________.
- A.
Gametes
- B.
Genes
- C.
Karyotypes
- D.
Alleles
Correct Answer
A. GametesExplanation
Gametes must be haploid in order for the zygote to receive the correct number of chromosomes.Rate this question:
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- 11.
The types of cells produced during mitosis are _________.
- A.
Haploid
- B.
Diploid
- C.
Gametes
- D.
Zygotes
Correct Answer
B. DiploidExplanation
Mitosis produces a cell that is exactly like the parent cell, with the full number of chromosomes.Rate this question:
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- 12.
A human body cell contains 46 chromosomes. How many chromosomes does a human gamete contain?
- A.
12
- B.
23
- C.
46
- D.
92
Correct Answer
B. 23Explanation
Gametes are haploid cells. They contain half the number of chromosomes as a normal body (somatic) cell.Rate this question:
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- 13.
The gamete of a fruit fly contains 4 chromosomes. How many chromosomes does a cell from the fruit fly's wing contain?
- A.
2
- B.
4
- C.
6
- D.
8
Correct Answer
D. 8Explanation
A gamete (egg or sperm) contains half the number of chromosomes of a cell from anywhere on the organism's body.Rate this question:
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- 14.
In a monohybrid cross, when a homozygous dominant individual is crossed with a homozygous recessive individual all of the offspring will be __________.
- A.
Homozygous dominant
- B.
Heterozygous
- C.
Homozygous recessive
Correct Answer
B. HeterozygousExplanation
TT x tt = 100% TtRate this question:
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- 15.
In a monohybrid cross, when two heterozygous individuals are crossed the genotypic ratio will be _______________.
- A.
4 heterozygous
- B.
3 dominant 1 recessive
- C.
1 homozygous dominant, 2 heterozygous, 1 homozygous recessive
Correct Answer
C. 1 homozygous dominant, 2 heterozygous, 1 homozygous recessiveExplanation
Tt x Tt = 1 TT: 2 Tt: 1 ttRate this question:
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- 16.
Which of the following are true of gametes?
- A.
Are formed during meiosis
- B.
Are haploid cells
- C.
Examples are eggs and sperm
- D.
Are formed during mitosis
- E.
Are diploid cells
- F.
When joined form a diploid cell
Correct Answer(s)
A. Are formed during meiosis
B. Are haploid cells
C. Examples are eggs and sperm
F. When joined form a diploid cellExplanation
Gametes are formed during meiosis, which is a type of cell division that produces haploid cells. Haploid cells contain half the number of chromosomes compared to the parent cell. Examples of gametes are eggs and sperm, which are reproductive cells in females and males, respectively. When gametes fuse during fertilization, they form a diploid cell, which contains the full set of chromosomes. Therefore, the statement "are formed during meiosis, are haploid cells, examples are eggs and sperm, when joined form a diploid cell" is true.Rate this question:
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- 17.
A normal man has 4 daughters, 4 sons, and 12 grandchildren. A daughter and a son have inherited a certain disease but the grandchildren are unaffected. This is an example of
- A.
Sex-linked dominant
- B.
Autosomal recessive
- C.
Autosomal dominant
- D.
Non-paternity
Correct Answer
B. Autosomal recessiveExplanation
Autosomal recessive traits are only expressed in people if they are homozygous recessive. Autosomal means that the trait is inherited regardless of gender.Rate this question:
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- 18.
Both males and females have this chromosome.
- A.
X
- B.
Y
- C.
L
Correct Answer
A. XExplanation
All people have at least one X chromosome. XX = female XY = maleRate this question:
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- 19.
Only males have this chromosome
- A.
X
- B.
Y
- C.
L
Correct Answer
B. YExplanation
Females = XX
Males = XYRate this question:
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- 20.
Type of factor or gene that can be masked or hidden by a dominant one
Correct Answer
RecessiveExplanation
A recessive factor or gene is one that is not expressed or visible when a dominant factor or gene is present. This means that the dominant factor or gene "masks" or hides the recessive one, preventing it from being seen or having an effect. In order for a recessive factor or gene to be expressed, both copies of the gene must be recessive, meaning that it is inherited from both parents. If only one copy is recessive and the other is dominant, the dominant gene will be expressed and the recessive one will be masked.Rate this question:
- 21.
Number of chromosomes in the human cells
Correct Answer
forty-six
46Explanation
The number of chromosomes in human cells is forty-six, which is also represented as 46. Chromosomes are thread-like structures that carry genetic information in the form of DNA. In humans, each cell typically contains 23 pairs of chromosomes, making a total of 46. These chromosomes determine various traits and characteristics of an individual.Rate this question:
- 22.
Most sex-linked genes are found on the
- A.
Y chromosome
- B.
O chromosome
- C.
YY chromosomes
- D.
X chromosome
Correct Answer
D. X chromosomeExplanation
Sex-linked genes are genes that are located on the sex chromosomes, which determine the sex of an individual. The Y chromosome is responsible for determining male characteristics, while the X chromosome is responsible for determining both male and female characteristics. Therefore, it is more likely for sex-linked genes to be found on the X chromosome rather than the Y chromosome or any other chromosome.Rate this question:
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- 23.
For the genotype below determine what phenotypes are possible. Purple flowers are dominant to white flowers.
- A.
PP=White, pp=purple, Pp=White
- B.
PP=Purple, pp=Purple, Pp=White
- C.
PP=Purple, pp=White, Pp=Purple
- D.
PP=White, pp=White, Pp=Purple
Correct Answer
C. PP=Purple, pp=White, Pp=PurpleExplanation
The genotype PP represents a homozygous dominant individual, which means they have two copies of the dominant allele for purple flowers. Therefore, their phenotype will be purple. The genotype pp represents a homozygous recessive individual, which means they have two copies of the recessive allele for white flowers. Therefore, their phenotype will be white. The genotype Pp represents a heterozygous individual, which means they have one copy of the dominant allele and one copy of the recessive allele. In this case, the dominant allele for purple flowers will determine the phenotype, so their phenotype will be purple.Rate this question:
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Jan 17, 2024Quiz Edited by
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Dec 05, 2012Quiz Created by
Carmichael
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