Answer:
A new mutation
Explanation:
A mutation refers to the random changes in the DNA of organisms. A mutation changes the allele and genotype frequencies by the introduction of a new allele in the gene pool.
However, mutations are not the major factor responsible for changes in the gene pool of a population as mutations are rare. The rate of mutations is very slow and does not allow it to serve as a major factor to change the allele and genotype frequencies.
In a plant species, if the b allele (blue flowers) and the b allele (white flowers) are incompletely dominant (bb is light blue), an all light blue offspring<span> ratio is expected in a cross between a blue-flowered plant and a white-flowered plant.</span>
Answer:
Lysozyme in the body fluid protects us from bacterial infection by damaging the cell wall of bacteria which ultimately kills the bacteria.
The bacterial cell wall is made up of NAG and NAM units which is joined by β (1-4) glycosidic bond. Lysozyme attacks on this bond and breaks it causing the damage in the cell wall of bacteria which leads to the death of bacteria.
Archaeal cell wall do not contain β (1-4) glycosidic linkage, it contains β(1-3) glycosidic linkage in its cell wall between NAT and NAG unit and lysozyme do not able to break β(1-3) glycosidic linkage between them so lysozyme do not cause any harm to the archaeal invaders.
