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Poor fertility is associated with
EXPLANATION
Qualitative Genetics
- Rose Comb and Subfertility in Roosters:
- Homozygous Rose-comb cocks ($RR$) exhibit a well-documented genetic subfertility syndrome.
- The $R$ allele is associated with a chromosomal inversion that disrupts the sperm motility gene, resulting in abnormal flagellar function and extremely reduced duration of sperm motility in the oviduct storage tubules.
Correct option: (1) Rose comb
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