Quiz about Basic Genetics
Quiz about Basic Genetics

Basic Genetics | 10 Question Sci / Tech Multiple Choice Quiz


Genetics determines who you are and what you look like. This is a general quiz, covering inheritance, genetic diseases and genetic engineering.

A multiple-choice quiz by icicle88. Estimated time: 4 mins.
  1. Home
  2. »
  3. Quizzes
  4. »
  5. Science Trivia
  6. »
  7. Health and Human Biology
  8. »
  9. Reproduction and Genetics

Author
icicle88
Time
4 mins
Type
Multiple Choice
Quiz #
150,197
Updated
Dec 03 21
# Qns
10
Difficulty
Average
Avg Score
6 / 10
Plays
5158
Last 3 plays: snhha (10/10), Johnson642 (4/10), rdeg2000 (7/10).
This quiz has 2 formats: you can play it as a or as shown below.
Scroll down to the bottom for the answer key.
1. What is the haploid number of chromosomes for human beings? Hint

23
24
46
48

2. Which of the following is NOT a genetically inherited disease? Hint

AIDS
Huntington's chorea
cystic fibrosis
red-green colour blindness

3. Point mutations in a chromosome involve changes to single bases.

True
False

4. If you have the genotype Bb for eye colour, you are a homozygote.

True
False

5. What does Mendel's Second Law of Independent Assortment state? Hint

Certain chromosomes are more likely to be passed onto offspring than others.
Each individual offspring has equal chance of getting one half of any gene pair or the other from a parent.
Each offspring in a litter will inherit the same chromosomes from each of their parents.
This law was stated by Darwin, not Mendel.

6. Genes and proteins cannot be introduced into a crop from another species.

True
False

7. Which of the following is a sex-linked genetic disease? Hint

red-green colour blindness
thalassaemia
cystic fibrosis
Down Syndrome

8. Which of the following associated issues is of least concern in personal gene testing (not gene testing of an unborn fetus)? Hint

psychological impact
physical risk
discrimination
family relations

9. The first attempt to treat a disease by inserting a normal gene into the cells of a sufferer of an inherited disease was made in 1990. Which disease was this? Hint

sickle-cell anaemia
ADA deficiency
haemophilia
thalassaemia

10. Which of the following has, historically, NOT been considered an example of continuous variation in humans? Hint

'curliness' of hair
height
gender
skin colour


(Optional) Create a Free FunTrivia ID to save the points you are about to earn:

arrow Select a User ID:
arrow Choose a Password:
arrow Your Email:




Quiz Answer Key and Fun Facts
1. What is the haploid number of chromosomes for human beings?

Answer: 23

Most cells in the human body have 46 chromosomes (23 pairs) in their nucleus. Gametes have a haploid number of chromosomes, which is half the diploid number, i.e. 23.
2. Which of the following is NOT a genetically inherited disease?

Answer: AIDS

AIDS is caused by the HIV virus, and is not genetically inherited. It can, however, be passed from mother to child through her breastmilk.
3. Point mutations in a chromosome involve changes to single bases.

Answer: True

Point mutations can cause a single base to be lost or replaced by another base. An example of a genetic disease caused by a single point mutation is sickle cell anaemia.
4. If you have the genotype Bb for eye colour, you are a homozygote.

Answer: False

An allele is a type of gene e.g. blue and brown are both genes for eye colour, but they are different alleles. A homozygote for a particular trait has only 1 type of allele in their genotype, e.g. BB or bb. A heterozygote has 2 different alleles in their genotype, e.g. Bb.
5. What does Mendel's Second Law of Independent Assortment state?

Answer: Each individual offspring has equal chance of getting one half of any gene pair or the other from a parent.

Mendel's First Law of segregation states that when a gamete is formed, the pair of alleles for a particular trait in the parent separates. Mendel's Second Law of independent assortment states that the segregation of one pair of alleles is independent of the segregation of any other pair of alleles.
6. Genes and proteins cannot be introduced into a crop from another species.

Answer: False

For example, a bacteria gene which increases resistance to insect attack has successfully been introduced into corn plants.
7. Which of the following is a sex-linked genetic disease?

Answer: red-green colour blindness

Sex-linked genetic diseases occur more often in one sex than another (usually males). This happens because females have the genotype XX, whereas males have the genotype XY. The genes which control diseases like haemophilia and colour blindness are located on the X chromosome. Usually, the normal allele is dominant and the allele causing the disease is recessive. Because females have 2 X chromosomes, both the chromosomes have to have the recessive allele in order for the disease to be expressed.

But because males have only 1 X chromosome, they only need 1 recessive allele that causes the disease for it to be expressed.
8. Which of the following associated issues is of least concern in personal gene testing (not gene testing of an unborn fetus)?

Answer: physical risk

The gene test usually involves only a blood sample, so the physical risks are minimal. The main thing that concerns people is how the results of a gene test will impact their lives. Discovering that a person is likely to develop a serious disease can cause depression, confusion and despair.

It can affect family relations, causing fear, anger or guilt in those who have or have not inherited particular genes. It can also lead to discrimination in areas like employment and health insurance e.g. an insurance company may refuse to cover you because you are likely to develop heart disease.
9. The first attempt to treat a disease by inserting a normal gene into the cells of a sufferer of an inherited disease was made in 1990. Which disease was this?

Answer: ADA deficiency

People with ADA (adenine deaminase) deficiency are less able to fight infections because many of their white blood cells die. In this study, bone marrow cells were taken from 2 ADA deficient girls and normal ADA genes were inserted into the cells. These were injected into the blood, from where they travelled back to the bone marrow.

It was hoped that the genetically engineered cells would multiply there, making cells which could produce the ADA enzyme. Today, the 2 girls are healthy and have fully functional immune systems.
10. Which of the following has, historically, NOT been considered an example of continuous variation in humans?

Answer: gender

Continuous variation has people fitting in anywhere between two extremes. Discontinuous variation has traditionally classed people as fitting into definite categories, e.g. male or female. More recently, gender has been considered less as a binary distinction but existing along a spectrum.
Source: Author icicle88

This quiz was reviewed by FunTrivia editor crisw before going online.
Any errors found in FunTrivia content are routinely corrected through our feedback system.
Most Recent Scores
Jan 24 2023 : snhha: 10/10
Dec 25 2022 : Johnson642: 4/10
Dec 08 2022 : rdeg2000: 7/10

Score Distribution

quiz
2/1/2023, Copyright 2023 FunTrivia, Inc. - Report an Error / Contact Us