Question

(a) Why do we say that homozygous plants produce pure progeny ? (b) Explain how the process of speciation takes place .

Answer 1

a)Homozygous plants always produce pure progeny For example consider homozygous tall plants Parents---> TT TT Gametes->. T. T Progeny->> TT Thus all plants which are homozygous produce pure progeny b)Speciation means formation of new species from pre existing species.Some factors leading to speciation are 1)Natural selection 2)Genetic drift 3)Geographic isolation 4)Reproductive isolation