Question

1. What is a gene family and how do gene families form?
2. The earth is hypothesized to be ~4.6 billion years old. How has the earth changed over time relative to present day

Answer 1

Question

Gene families are the group of the similar genes and all these genes are thought to evolved from a single gene duplication process. Also, these genes perform similar biochemical function. Therefore, the gene families arise by gene duplication event. For example, hemoglobin subunits coding gene are 10 genes that belong to two clusters and located on different chromosome, known as alpha and beta globin gene.

The Earth have change a lot over the time. Some of these changes are following:

I. The continents slowly creep across the Earth surface.

II. Mountain form and get evaded later.

III. Climate have change drastically.

IV. Earth have become warmer now.

V. Atmospheric Carbon dioxide is growing at explosive rates.