GATE XL · 2023 · XL-T
Question 102: Genetics and genomics
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Question 102
XL-TNAT2 marksNeeds review
Wild-type Drosophila females having three linked genes (A,B,C) were crossed with triple recessive mutant (aabbcc) males. The F₁ female progenies (AaBbCc) were back crossed with the triple negative mutant (aabbcc) males. The cross resulted in following number of progenies in F₂:
AaBbCc 241
Aabbcc 112
aaBbCc 103
aabbcc 252
aaBbcc 17
aabBCc 134
AabbCc 14
AaBbcc 127
1000
The order of genes as determined from the above data was found to be “ABC” (note that the order is equivalent to “CBA” and the order outside the markers are arbitrary).
The recombination map distance (in centi Morgan) between “A to C” is ______ (round off to one decimal place).
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2023XL-T
GATE XL 2023 · Paper 1
Life Sciences · Original paper archive
- Section
- Section XL-T
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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