A specific rat population was controlled for about a decade by a poiso

1.	A specific rat population was controlled for about a decade by a poison. After apopulation decline for about 10 years, the rat population was increased stabilized.Resistance to poison is governed by a dominant autosomal gene ‘R’. In 1975 majority of the resistant animals are heterozygous at this locus (Rr).(a) What was the major genotype of the rat population before 1961 ?(A) RR, (B) Rr, (C) rr, (D) R is absent as it is produced by a mutation.(b) What explanation you give for the development of resistance against poison in these rats? (c) This illustration can be utilized to explain a theory of Evolution” Substantiate.
Answer» (a) R is absent as it is produced by mutation (b) Mutation leads to genetic variation and which in turn lead to evolution (c) Evolution by anthropogenic action

A specific rat population was controlled for about a decade by a poison. After apopulation decline for about 10 years, the rat population was increased stabilized.Resistance to poison is governed by a dominant autosomal gene ‘R’. In 1975 majority of the resistant animals are heterozygous at this locus (Rr).(a) What was the major genotype of the rat population before 1961 ?(A) RR, (B) Rr, (C) rr, (D) R is absent as it is produced by a mutation.(b) What explanation you give for the development of resistance against poison in these rats? (c) This illustration can be utilized to explain a theory of Evolution” Substantiate.

Answer»

(a) R is absent as it is produced by mutation

(b) Mutation leads to genetic variation and which in turn lead to evolution

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