Genetics and Heredity MCQs with Answers

adminJune 13, 2024

0 10 2 minutes read

Welcome to the Genetics and Heredity MCQs with Answers. In this post, we have shared Genetics and Heredity Online Test for different competitive exams. Find practice Genetics and Heredity Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Genetics and Heredity.

Genetics and heredity are terms used in the field of biology to describe how characters pass on from one generation to the next. Genetics is a study of genes, genetic variation, and the role genes play in living organisms. It is a study of the molecular mechanisms involved in gene function and how genetic information is passed on.

Heredity is the passing of genetic information in a trait from parents to their offspring. Often, it occurs inherited in an order stipulated by the Mendelian principles of Gregor Mendel, the man who discovered how some traits are passed on from one generation to another by the dominant and recessive alleles. According to Mendel’s laws, genes occur in pairs, where each parent gives one gene from each pair to its offspring.

Modern genetics has reached its limits with Mendelian doctrine. Today, science focuses on complex inheritance patterns-incomplete dominance, co-dominance, and polygenic traits. Scientists apply modern techniques of DNA sequencing and genetic mapping to study variations in the genetic makeup that affect health, development, and disease.

Understanding genetics and heredity has many very useful applications. For instance, in medicine, it will help someone identify hereditary conditions, guide the treatment, and help anticipate risks for certain diseases. It is used in agriculture by developing crops based on desirable traits, such as yield or resistance to certain diseases.

Genetics and heredity in general have been the basis that grounds the understanding of the diversity of biological organization and transmission, highly impacting medicine, agriculture, and biological evolution.

Genetics and Heredity Online Quiz

By presenting 3 options to choose from, Genetics and Heredity Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Genetics and Heredity Questions and Answers and click over the correct answer.

Test Name: Genetics and Heredity MCQ Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply click on question and comment below that question. so that we can update the answer in the quiz section.

Genetics and Heredity

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1 / 40

The term for having two identical alleles for a particular gene is ____.

Dominant

Homozygous

Heterozygous

2 / 40

The number of chromosomes in a human gamete is ____.

3 / 40

The trait that is expressed in the heterozygous condition is ____.

Recessive

Codominant

Dominant

4 / 40

The physical appearance of an organism is its ____.

Phenotype

Genotype

Chromosome

5 / 40

The type of inheritance where the phenotype of heterozygotes is intermediate between the phenotypes of individuals homozygous for either allele is ____.

Complete dominance

Codominance

Incomplete dominance

6 / 40

The process by which genes from both parents are combined and passed on to offspring is ____.

Meiosis

Heredity

Fertilization

7 / 40

The first filial generation in a cross is denoted as ____.

P generation

F1 generation

F2 generation

8 / 40

The father of modern genetics who formulated the principles of heredity through pea plant experiments was ____.

Thomas Hunt Morgan

Charles Darwin

Gregor Mendel

9 / 40

The diagram that shows the presence or absence of a trait across several generations is a ____.

Pedigree

Punnett square

Karyotype

10 / 40

The likelihood that a heterozygous genotype will express the recessive phenotype is ____.

Expressivity

Carrier probability

Penetrance

11 / 40

The genetic disorder characterized by a progressive breakdown of nerve cells in the brain is ____.

Cystic fibrosis

Huntington's disease

Duchenne muscular dystrophy

12 / 40

The inheritance pattern where both alleles contribute equally and fully to the phenotype is ____.

Codominance

Incomplete dominance

Complete dominance

13 / 40

The condition where one gene influences multiple, seemingly unrelated phenotypic traits is ____.

Pleiotropy

Polygenic inheritance

Epistasis

14 / 40

The genetic makeup of an organism is its ____.

Genotype

Phenotype

Allele

15 / 40

The different forms of a gene that can exist are called ____.

Alleles

Phenotypes

Genotypes

16 / 40

The diagram used to predict the outcome of a particular cross or breeding experiment is a ____.

Pedigree

Karyotype

Punnett square

17 / 40

The sex-linked disorder that impairs the blood's ability to clot properly is ____.

Hemophilia

Cystic fibrosis

Down syndrome

18 / 40

The type of inheritance where a trait is determined by the interaction of alleles at multiple loci is ____.

Incomplete dominance

Polygenic inheritance

Codominance

19 / 40

The phenomenon where a single gene has multiple effects on different traits is ____.

Pleiotropy

Epistasis

Polygenic inheritance

20 / 40

The likelihood that a genotype will manifest as its corresponding phenotype is ____.

Penetrance

Probability

Expressivity

21 / 40

The probability of rolling a six on a fair six-sided die is ____.

45294

45297

45293

22 / 40

The genetic disorder caused by a mutation in the CFTR gene, affecting the lungs and digestive system, is ____.

Huntington's disease

Cystic fibrosis

Sickle cell anemia

23 / 40

The genetic principle that states that alleles segregate independently during gamete formation is ____.

Law of Segregation

Law of Independent Assortment

Law of Dominance

24 / 40

The type of cell division that produces gametes with half the chromosome number is ____.

Fertilization

Meiosis

Mitosis

25 / 40

The units of hereditary information located on chromosomes are ____.

Genes

Alleles

Proteins

26 / 40

The inheritance pattern where multiple genes contribute to the phenotype of a trait is ____.

Codominance

Polygenic inheritance

Epistasis

27 / 40

The genetic disorder caused by a defect in the gene encoding hemoglobin is ____.

Cystic fibrosis

Huntington's disease

Sickle cell anemia

28 / 40

The branch of biology that studies how traits are passed from parents to offspring is ____.

Evolution

Genetics

Ecology

29 / 40

The genetic disorder caused by the presence of an extra chromosome 21 is ____.

Down syndrome

Turner syndrome

Klinefelter syndrome

30 / 40

The process by which homologous chromosomes exchange genetic material during meiosis is ____.

Independent assortment

Segregation

Crossing over

31 / 40

The process by which chromosomes condense and become visible during cell division is ____.

Karyotyping

Meiosis

Crossing over

32 / 40

The disorder caused by a defect in the X chromosome resulting in progressive muscle degeneration is ____.

Duchenne muscular dystrophy

Hemophilia

Turner syndrome

33 / 40

The condition where one allele is not completely dominant over another is ____.

Multiple alleles

Incomplete dominance

Codominance

34 / 40

The inheritance pattern where two or more genes affect a single phenotype is ____.

Polygenic

Codominance

Epistasis

35 / 40

The sex chromosomes in humans are denoted as ____.

X and X

X and Y

Y and Y

36 / 40

The phenotype resulting from the interaction of multiple genes is ____.

Monogenic

Homozygous

Polygenic

37 / 40

The genetic disorder caused by the presence of an abnormal hemoglobin molecule is ____.

Sickle cell anemia

Down syndrome

Duchenne muscular dystrophy

38 / 40

The term for the alleles an individual has for a particular gene is ____.

Homozygous

Phenotype

Genotype

39 / 40

The genetic disorder caused by the absence of an enzyme needed to break down a lipid is ____.

Down syndrome

Sickle cell anemia

Tay-Sachs disease

40 / 40

The likelihood that a particular event will occur is called ____.

Phenotype

Genotype

Probability

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adminJune 13, 2024

0 10 2 minutes read