NEET UG 2024 — Principles of Inheritance and Variation

Given below are two statements: Statement I: Failure of segregation of chromatids during cell cycle resulting in the gain or loss of whole set of chromosome in an organism is known as aneuploidy. Statement II: Failure of cytokinesis after anaphase stage of cell division results in the gain or loss of a chromosome is called polyploidy. In the light of the above statements, choose the correct answer from the options given below:

Match List-I with List-II: \begin{array}{llll} List-I & List-II \\Type of Inheritance & Example \\A.Incomplete dominance & I. Blood groups in human \\B.Co-dominance & II. Flower colour in Antirrhinum \\C.Pleiotropy & III. Skin colour in human \\D.Polygenic inheritance & IV.Phenylketonuria\end{array} Choose the correct answer from the options given below:

Match List I with List II : \begin{array}{|l|l|l|l|}\hline & List I & & List II \\\hline A. & Down's syndrome & I. & 11^{\text {th }} chromosome \\\hline B. & \alpha-Thalassemia & II. & 'X' chromosome \\\hline C. & \beta-Thalassemia & III. & 21^{\text {st }} chromosome \\\hline D. & Klinefelter's syndrome & IV. & 16^{\text {th }} chromosome \\\hline\end{array} Choose the correct answer from the options given below :

When a tall pea plant with round seeds was selfed, it produced the progeny of : (a) Tall plants with round seeds and (b) Tall plants with wrinkled seeds. Identify the genotype of the parent plant.

Given below are two statements: Statement I: When many alleles of a single gene govern a character, it is called polygenic inheritance. Statement II: In Polygenic inheritance, the effect of each allele is additive. In the light of the above statements, choose the correct answer from the options given below.

Aneuploidy is a chromosomal disorder where chromosome number is not the exact copy of its haploid set of chromosomes, due to : A. Substitution B. Addition C. Deletion D. Translocation E. Inversion Choose the most appropriate answer from the options given below :

Match List I with List II  Choose the correct answer from the options given below:

A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?

Which one of the following can be explained on the basis of Mendel's Law of Dominance? A. Out of one pair of factors one is dominant and the other is recessive. B. Alleles do not show any expression and both the characters appear as such in $F_2$ generation. C. Factors occur in pairs in normal diploid plants. D. The discrete unit controlling a particular character is called factor. E. The expression of only one of the parental characters is found in a monohybrid cross. Choose the correct answer from the options given below: