Q15 of 53 Page 29

It is said that Mendel proposed that the factor controlling any character is discrete and independent. His proposition was based on the

There was no blending of characters or traits in the progeny. That is, when a tall and a short plant were crossed, no medium height plants were observed. That meant that the factors (genes) were discrete (individually separate) and independent of each other.

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13

In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are:

 14

The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to:

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Two genes ‘A’ and ‘B’ are linked. In a dihybrid cross involving these two genes, the F1 heterozygote is crossed with homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?

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In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are: