Question

QUESTION 15 may have been the first informational molecule. Two researchers suggested in the 1960s that O a. DNA O b.a protein O ca saccharide O d. a peptide Oe. RNA QUESTION 16 If all offspring of a cross have the same heterozygous genotype, the parents of the cross would most likely be a. homozygous dominant and heterozygous. Ob.both heterozygous. O c. homozygous dominant and homozygous recessive. O d. both homozygous dominant. O e. heterozygous and homozygous recessive.

Answer 1

Q15

Two researchers in the 1960s suggested that RNA may have been the first informational molecule.

DNA is the hereditary material present in the human as well as other organisms

A peptide is a short chain of amino acid

Protein is basically essential nutrient for the human body

A saccharide is basic unit of Carbohydrate whose general chemical formula is C_n(H₂O)_n

Q16

If all offsprings of a cross have a same heterozygous genotype, the parent of the cross would most likely be homozygous dominant and homozygous recessive.

This can be explained very well with the help of Punnet Square.For example , if we take allele AA and BB as homozygous dominant while Aa and Bb being the heterozygous ,also aa and bb being the homozygous recessive . After crossing it is found that only when the cross is between AA and bb ,there is same heterozygous genotype in the offspring