Principles of I...

Experimental verification of the chromosomal theory of inheritance was done by

Variations caused by mutation, as proposed by Hugo de Vries are:

The percentage of heterozygous individuals obtained in F$$_{2}$$ generation from selfing the plants with genotype Rr would be

Discontinuous variations are

Assertion:  Plasmids are single stranded extra chromosomal DNA.

Reason:  Plasmids are found in Eukaryotic cells.

Grain colour in wheat is determined by three pairs of polygenes. Following cross AABBCC (dark colour) $$\times$$ aabbcc (light colour), in F$$_2$$ generation what proportion of the progeny is likely to resemble either parent?

Grain colour in wheat is determined by three pairs of polygenes. Following the cross AABBCC (dark colour) x aabbcc (light colour), how many plants will be produced with the genotype AABBCC?

Given above is a pedigree chart of a family with five children. It shows the inheritance of attached earlobes as opposed to the free ones. The squares represent the male individuals and circles the female individuals. Which one of the following conclusions drawn is correct?

Given above is a pedigree chart showing the inheritance of a certain sex-linked trait in humans. Which is the trait traced in the above pedigree chart?

Assertion:  Phenylketonuria is a recessive hereditary disease caused by body's failure to oxidise an amino acid phenylalanine to tryrosine, because of a defective enzyme.

Reason:  It results the presence of phenylalanine acid in urine.