NEET 2010 · Class 12

Principles of Inheritance and Variation

Select the correct statement from the ones given below with respect to dihybrid cross.

  1. (A)Tightly linked genes on the same chromosomes show higher recombinations.
  2. (B)Genes far apart on the same chromosome show very few recombinations.
  3. (C)Genes loosely linked on the same chromosome show similar recombinations.
  4. (D)Tightly linked genes on the same chromosome show very few recombinations.

The NCERT line that answers it

Verbatim line

Morgan and his group also found that even when genes were grouped on the same chromosome, some genes were very tightly linked (showed very low recombination) (Figure 4.11, Cross A) while others were loosely linked (showed higher recombination) (Figure 4.11, Cross B).

Chapter
Principles of Inheritance and Variation
Section
4.3.3 Linkage and Recombination
Page
16
Words matched
42 of 42

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'some genes were very tightly linked (showed very low recombination)', which directly matches option D's claim that 'tightly linked genes on the same chromosome show very few recombinations'.

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