Free Inheritance MCQs with Answers

• A. Saad, Ahmed, and Ali
• B. Ahmed, Ali, Alia, and Ayesha
• C. Saad and Sara
• D. Alia and Ayesha
• E. Ahmed and Ali

Explanation: Hemophilia is an X-linked recessive disorder, meaning that males (XY) need only one affected X chromosome to express the disorder, while…

• A. It is a sex-linked trait
• B. Occurs due to hormonal differences between sexes
• C. Heterozygous male is normal
• D. Homozygous female is normal

Explanation: Pattern baldness, also known as androgenic alopecia, is influenced by hormonal differences, specifically the effects of androgens (male…

• A. I gave in because I didn't have the strength to argue.
• B. I gave in because I didn't have strength to argue.
• C. I gave in because I didn't have a strength to argue.
• D. I gave in because I don't have strength to argue.

Explanation: The sentence describes a situation where the speaker lacked the energy or courage to continue arguing, and "the strength" is the correct…

• A. Headmaster - Mr. welldon, however, took a broadminded view of my Latin prose.
• B. Headmaster- Mr. welldon, however, took a broadminded view of my Latin prose.
• C. Headmaster, Mr. welldon. however, took a broadminded view of my Latin prose.
• D. Headmaster, Mr. welldon, however, took a broadminded view of my Latin prose.

Explanation: This sentence is identical to and is correct in its use of commas to set off the appositive "Mr.

• A. Glucose and fructose both are monosaccharides
• B. The natural glucose and fructose are D-forms
• C. The solution having equal molecules of D-glucose and D-fructose is termed inverted sugar
• D. Aldohexoses exist in 2 optical forms

Explanation: This statement is not true. Aldohexoses, including glucose, exist in multiple optical forms.

• A. Two factors for the same trait separate in the production of gametes
• B. Two different traits will be inherited independently of each other
• C. Gametes are produced by meiosis
• D. All of the above

Explanation: The Law of Segregation states that alleles segregate randomly into gametes: When gametes are formed, each allele of one parent segregates…

• A. Form of appearance of a trait
• B. Genetic complement of an individual
• C. Partner of gene on chromosomes
• D. None of the above

Explanation: The external appearance of an individual trait is known as 'Phenotype'.

• A. Obtained by self fertilization
• B. It is homozygous trait
• C. It produces homozygous offspring
• D. All of the above

Explanation: A true-breeding variety upon self-fertilization always produced offspring identical to the parents.

• A. Haemophilia
• B. Colour blindness
• C. Hypophosphatemia
• D. TFM syndrome

Explanation: Hereditary hypophosphatemic rickets with hypercalciuria (HHRH) is a rare bone disorder characterized by symptoms associated with…

• A. Different alleles of a gene are both expressed in heterozygous condition
• B. One allele (R) is completely dominant over the other (r) and the presence of the recessive allele is functionally hidden, so the heterozygote (Rr) has the same round phenotype as the (RR) homozygote.
• C. The phenotype of the heterozygote is intermediate between phenotypes of the two homozygotes
• D. Gene mutations may produce many different alleles of a gene

Explanation: Complete dominance is a form of dominance in a heterozygous condition wherein the allele that is regarded as dominant completely masks the…

• A. Controls a trait only in combination with another gene
• B. Controls multiple traits in an individual
• C. Is expressed only in primitive plants
• D. Is a gene evolved during Pliocene

Explanation: The ability of a gene to have multiple phenotypic effects because it influences a number of characters simultaneously is known as…

• A. Position of gene on homologous chromosomes
• B. Regions of chromosomes
• C. Position of an allele within a DNA molecule.
• D. Close regions of the same chromosomes.

Explanation: The position of a gene on the chromosome is called its locus.

• A. Chromosomes behaviour in mitosis
• B. Cytokinesis in mitosis and meiosis
• C. Chromosomes behaviour in meiosis
• D. Mendel's laws have not ben explained

Explanation: Correct option: C Mendel's laws, which describe patterns of inheritance, can be explained by the behavior of chromosomes during meiosis.

• A. 5
• B. 6
• C. 7
• D. 8

Explanation: Pisum sativum, the common Pea, normally has seven pairs of chromosomes at meiosis.

• A. Population tool
• B. Species tool
• C. Gene pool
• D. All of these options are correct

Explanation: The gene pool is the set of all genes, or genetic information, in any population, usually of a particular species.

• A. Plants
• B. Animals
• C. Bacteria
• D. Virus

Explanation: Polyploidy is the state in which an organism or cell has more than two complete sets of chromosomes. It is common only in plants.

• A. 3:1 expected, 2:1 obtained
• B. 2:1 expected, 3:1 obtained
• C. 1:1 expected, 3:1 obtained
• D. 1:1 expected, 2:1 obtained

Explanation: The correct answer is that the expected ratio in the F2 generation is 3:1, and the obtained ratio is 2:1.

• A. Due to a condition like aspermia in the man
• B. Due to the genetic makeup of the particular sperm that fertilizes the egg
• C. Due to the genetic makeup of the egg
• D. Due to a defect in the woman

Explanation: In humans, sex determination is based on the combination of sex chromosomes at fertilization. A female is XX, and a male is XY.

• A. 1:1
• B. 3:1
• C. 1:2:1
• D. 4:1
• E. 3:2

Explanation: This is known as a monohybrid cross, involving the inheritance of a single trait (e.g., one gene with two alleles).

• A. Homozygous recessive
• B. Homozygous dominant
• C. Heterozygous
• D. None of these

Explanation: It will be heterozygous since the alleles are of 2 types.