Question

In a population of black coloured seagull black colour is due to melanin dominant allele.Mm and MM individuals are black and mm individuals are white.In each population 81 individuals are white coloured,with 19 black colored individuals.
Assuming Hardy-Weinberg equilibrium, what is the frequency of melanic allele in each population?
A)0.81
B)0.19
C)0.90
D)0.10

Answer 1

Hint: The term melanism refers to black pigment. Melanism is the increased production in the skin or hair of the dark-colored pigment melanin. The morbid deposition of black matter is called melanosis, sometimes of a malignant nature that induces pigmented tumours.

Complete answer:
Gulls, or colloquially, seagulls, in the suborder Lari, are seabirds in the Laridae family. They are most closely associated with terms and only more distantly associated with auks, skimmers and even more distantly with waders.

Seagulls live close to the sea—and shore. These birds can be found near the sea and lakes alike, despite their apparently ocean-exclusive name, and they do not differentiate between saltwater and freshwater bodies. Actually, since their bodies are adapted to flush out the salt when they drink it, seagulls may also drink saltwater. Currently, the seagull is the state bird of landlocked Utah, since they live mainly around the Great Salt Lake.

The Hardy-Weinberg equilibrium is a theory which states that in the absence of disturbing factors, genetic variation in a population will remain constant from one generation to the next. In a large population with no destructive conditions, when mating is random, the law assumes that both genotype and allele frequencies will stay constant since they are in balance.
MM/Mm = Black
mm =White
White=mm=81
Black=Mm/MM=19
Frequency of M , which is frequency of black = Total black individuals / Total population
Total black individuals=19
Total population = 100
Therefore Frequency of M= 19/100
M=0.19.

Hence, the correct answer is option (B)

Note: Seagulls are extremely protective of their young and build their nesting sites in more secluded environments, despite their willingness to live with humans. While the roofs of buildings may often include this these birds often build nests nearer to the water and on the steep slopes of cliff faces. This prevents most predators from entering their nests, which for community living are constructed in close proximity to each other.