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Biology Question 103 – NEET-UG 2024

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Match List I with List II List IList IIA. Two or more alternative forms of a geneI. Back crossB. Cross of F1 progeny with homozygous recessive parentII. PloidyC. Cross of F1 progeny with any of the parentsIII. AlleleD. Number of chromosome sets in plantIV. Test cross Choose the correct answer from the options given below:

This question tests your knowledge of fundamental terms in genetics and plant breeding.

Step 1: Define Genetic Terms✦ Active

Let's define each term from List I and find its corresponding match in List II: * **Allele (III):** Two or more alternative forms of a gene. (Matches A) * **Test cross (IV):** A cross between an individual with an unknown genotype and a homozygous recessive parent. (Matches B) * **Back cross (I):** A cross between an F1 individual and either of its parents. (Matches C) * **Ploidy (II):** Refers to the number of complete sets of chromosomes in a cell or organism. (Matches D)

Step 2: Match List I with List II○ Expand

Based on the definitions: * A. Two or more alternative forms of a gene → III. Allele * B. Cross of F1 progeny with homozygous recessive parent → IV. Test cross * C. Cross of F1 progeny with any of the parents → I. Back cross * D. Number of chromosome sets in plant → II. Ploidy

💡 Teacher's Secret Hint

Remember that a test cross is a specific type of back cross, but not all back crosses are test crosses.

Step 3: Select the Correct Option○ Expand

The correct combination is A-III, B-IV, C-I, D-II. Comparing this with the given options, option (2) matches this combination.

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