CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -How the Genetic Material in Sperm is Unpacked During Fertilization. Certain aspects of human reproductive biology are well understood; we know that when a sperm enters an egg, the genetic material from each cell merges to form a zygote, which develops into a human embryo (animated in the video).

Detailed explanation-2: -At fertilization, the sperm binds to a receptor on the surface of the egg and fuses with the egg plasma membrane, initiating the development of a new diploid organism containing genetic information derived from both parents (Figure 14.41).

Detailed explanation-3: -Genetic recombination (also known as genetic reshuffling) is the exchange of genetic material between different organisms which leads to production of offspring with combinations of traits that differ from those found in either parent.

Detailed explanation-4: -Genetic variation is increased by meiosis During fertilisation, 1 gamete from each parent combines to form a zygote. Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote.

Detailed explanation-5: -Definition. Crossing over, as related to genetics and genomics, refers to the exchange of DNA between paired homologous chromosomes (one from each parent) that occurs during the development of egg and sperm cells (meiosis).