Answer:
(c) Linkage will not result in
variations among siblings. Morgan carried out several dihybrid crosses in
Drosophila to study genes that were sex-linked.
Morgan came to know that the genes were
located on the X-chromosome and also observed that when the two genes in a
dihybrid cross were situated on the same chromosome, the proportion of parental
gene combinations were much higher than the non-parental type.
It indicates that due to the
physical association of the two genes. There will be no variations among
siblings. Independent assortment of genes means that allele pair separate
during the formation of gametes independently; it means that traits are transmitted
to offspring independently of one another.
Crossing over is the exchange of
genetic material between homologous chromosomes .It is one of the final phases
of genetic recombination. Mutation is the sudden inheritable change in genetic
material of an organism which transfers to next generation.
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