Answer:
The correct answer will be option-A
Explanation:
In the pedigree analysis, the description of a trait help shows the relation of a trait linked to a gene.
The pedigree analysis is usually used to determine the heredity of a disease in a family which has been described in the question also as
1. The trait is rare and present in both sexes- this shows that it is independent of sex chromosomes and since is rare is recessive.
2. A consanguineous mating- mating between close relative which result in autosomal recessive trait as the genes for the trait must be present on both the parents which happen only when they are closely related.
Thus, option-A is the correct answer.
What reaction? Can you show the whole problem?
<span>Owls live in a variety of habitats, including coniferous forests, mountains, deserts, and plains. The snowy owl lives in the cold tundra of the north. Owls nest in a variety of ways. Several species, such as great gray and great horned owls, live in old hawk or squirrel nests.</span>
It was beneficial for northern Europeans to be lactose tolerant when lactose intolerance was more common in most other places because of the fact of the lactase mutation and natural refrigeration of the climate
<u>Explanation:</u>
The most of the places in the world was lactose intolerant as when a child is born, the baby is lactose tolerant and so uptakes as many lactose as needs for it but then while growing up, the enzyme to digest those lactose are lactase which are found to be decreasing in the adult and so adult becomes lactose intolerants.
But in the North Europe and some parts of Central Europe, the climate served to be the natural refrigerator and by the advent of mutation. Northern Europeans became lactose tolerant, as they tend to retain the lactase enzyme. This was assisted with the famine conditions which let the adult have milk as the only option of food and energy.
