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If a bull doesn’t express the milking factor, where m+ is normal and m is a mutant gene, its genotype is?(a) m+/m+(b) m+/m(c) m/m(d) Can’t be specifiedThe question was posed to me in quiz.My enquiry is from Sex Influenced Traits and Sex Limited Traits in portion Chromosomes and Sex Determination of Cytogenetics

Answer»

The correct OPTION is (d) Can’t be SPECIFIED

The EXPLANATION: Milking factor is a sex influenced trait that is only EXPRESSED in females i.e. cows. Bulls will never express these genes irrespective of their phenotype. Hence, their GENOTYPE can’t be specified.



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