NEW DELHI: The Reproduction and Inheritance section of NEET UG 2025 covers critical concepts such as genetic linkage, dominant and recessive alleles, meiosis, crossing over, and chromosomal disorders. These 25 MCQs challenge students to recall and apply knowledge of genetic inheritance, including understanding complex patterns like codominance, incomplete dominance, and X-linked inheritance.
NEET UG 2025: Quiz on Reproduction and Inheritance
1.
Question: Which of the following statements about mitosis is true?
a) It results in two daughter cells with half the chromosome number
b) It is a type of sexual reproduction
c) It results in genetically identical daughter cells
d) It involves the fusion of gametes
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Question: In humans, the XX chromosome combination represents:
a) A female
b) A male
c) An intersex individual
d) A transgender individual
3.
Question: Which of the following is true about crossing over?
a) It occurs during anaphase II of meiosis
b) It leads to genetic recombination
c) It occurs during prophase I of mitosis
d) It ensures the formation of identical gametes
4.
Question: Which of the following terms refers to the process where one allele completely masks the expression of another allele?
a) Incomplete dominance
b) Codominance
c) Complete dominance
d) Polygenic inheritance
5.
Question: Thomas Morgan is famous for his experiments on fruit flies. He concluded that:
a) All genes are linked
b) Genes are located on chromosomes
c) Genes are located on mitochondria
d) Genes follow Mendel’s laws
6.
Question: In human genetics, a carrier of an X-linked recessive disorder:
a) Always shows symptoms of the disorder
b) Is always male
c) Has one normal allele and one mutant allele
d) Is unaffected and does not pass the allele to offspring
7.
Question: The inheritance of blood groups is an example of:
a) Incomplete dominance
b) Codominance
c) Sex-linked inheritance
d) Multiple allelism
8.
Question: Which of the following is the correct sequence of events during meiosis I?
a) Prophase I → Metaphase I → Anaphase I → Telophase I
b) Prophase I → Telophase I → Anaphase I → Metaphase I
c) Metaphase I → Telophase I → Prophase I → Anaphase I
d) Anaphase I → Prophase I → Metaphase I → Telophase I
9.
Question: Polygenic inheritance involves:
a) The interaction of multiple alleles at a single gene locus
b) The influence of multiple genes on a single trait
c) The inheritance of linked genes
d) The inheritance of sex-linked traits
10.
Question: In pea plants, the gene for flower color exhibits incomplete dominance. If a red-flowered plant (RR) is crossed with a white-flowered plant (WW), the offspring will be:
a) All red-flowered
b) All white-flowered
c) Pink-flowered
d) Some red and some white
11.
Question: Which of the following refers to the process of fertilization?
a) Formation of gametes
b) Fusion of male and female gametes to form a zygote
c) Development of offspring
d) Division of the zygote into multiple cells
12.
Question: The phenomenon in which both alleles contribute equally to the phenotype is called:
a) Codominance
b) Incomplete dominance
c) Recessive inheritance
d) Genetic drift
13.
Question: The age of the mother can increase the risk of having a child with:
a) Sickle cell anemia
b) Down syndrome
c) Cystic fibrosis
d) Hemophilia
14.
Question: In Mendel’s experiments, the first filial generation (F1) plants were:
a) All hybrid and showed both parental traits
b) All hybrid and showed the dominant trait
c) Both hybrid and showed both recessive traits
d) Non-hybrid and showed both traits equally
15.
Question: In human males, the SRY gene located on the Y chromosome is responsible for:
a) The development of ovaries
b) The development of testes
c) The development of secondary sexual characteristics
d) Both a and b
16.
Question: A genetic disorder caused by a dominant allele is:
a) Cystic fibrosis
b) Hemophilia
c) Huntington’s disease
d) Sickle cell anemia
17.
Question: The process of meiosis II is similar to:
a) Mitosis
b) Meiosis I
c) Fertilization
d) DNA replication
18.
Question: The inheritance pattern in which one gene is inherited on the X chromosome is called:
a) Autosomal inheritance
b) Sex-linked inheritance
c) Cytoplasmic inheritance
d) Mendelian inheritance
19.
Question: In a test cross, the individual with the dominant phenotype is crossed with:
a) An individual with a recessive phenotype
b) An individual with a heterozygous genotype
c) An individual with the same dominant phenotype
d) An individual with a homozygous dominant genotype
20.
Question: The law of independent assortment states that:
a) Alleles for different traits segregate independently during gamete formation
b) One gene influences the inheritance of another gene
c) Gametes contain both alleles of a gene
d) Alleles separate during meiosis I and recombine during meiosis II
21.
Question: Genetic linkage refers to:
a) The inheritance of traits controlled by genes on different chromosomes
b) The inheritance of traits controlled by genes on the same chromosome
c) The process of gene recombination
d) The dominance of one gene over another
22.
Question: Haploinsufficiency occurs when:
a) One copy of a gene is sufficient for normal function
b) One copy of a gene is not enough to produce the normal phenotype
c) Both copies of a gene are deleted
d) A single gene is deleted from the chromosome
23.
Question: The difference between mitosis and meiosis is that meiosis results in:
a) Two identical daughter cells
b) Four genetically different haploid cells
c) Two genetically different haploid cells
d) One diploid cell and one haploid cell
24.
Question: Which of the following is an example of a sex-linked recessive disorder?
a) Down syndrome
b) Hemophilia
c) Cystic fibrosis
d) Huntington’s disease
25.
Question: In crossing over, genetic material is exchanged between:
a) Sister chromatids of the same chromosome
b) Homologous chromosomes
c) Non-homologous chromosomes
d) Non-sister chromatids of homologous chromosomes
Answer Key (Horizontal)
1. c 2. a 3. b 4. c 5. b 6. c 7. a 8. a 9. b 10. c 11. b 12. a 13. b 14. b 15. b 16. c 17. a 18. b 19. a 20. a 21. b 22. b 23. b 24. b 25. d
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