Fred and Ethel have normally pigmented skin but they have a child who is an albino. They are carriers of a recessive trait = heterozygotes.  STOP – READ THAT LAST SENTENCE AGAIN – YOU ARE GOING TO NEED IT TO ANSWER THE SECOND QUESTION. Use A or a for alleles. […]

Elegans with the mutation sma-2 results in a mutant phenotype characterized  by small body size. You place a hermaphrodite that is homozygous for sma-2 and a hermaphrodite that is homozygous wile-type (+) on a single plate.  Monohybrid Crosses: Crosses in which one pair of alleles is involved.  C &sans with […]

Q1. While breathing underwater with scuba equipment, gas is supplied by tank at higher than atmospheric pressure to overcome the extra pressure imposed by the overlying water. Ralph is taking scuba diving classes, and is warned not to hold his breath as ascending from depth but to continuously release air […]

Q. Most biologists believe that the immune system’s defence against infections largely rests on its capability to distinguish self molecules from non-self molecules. This concept seems central to our understanding of immune function. Yet, like all scientific ideas, it is not beyond question. Several immunologists have developed an alternative hypothesis: […]