Final answer:
Each pair of homologous chromosomes consists of one chromosome from each parent, contributing to genetic diversity in offspring. The homologous chromosomes carry genes for the same traits but may have different alleles.
Step-by-step explanation:
Each pair of homologous chromosomes has one chromosome from the mother and one chromosome from the father. In humans, every individual receives a set of 23 chromosomes from each of their parents, making up 23 pairs of chromosomes in each cell. The homologous chromosomes are similar in size, shape, and gene content but can have different alleles for those genes, leading to genetic variation. For example, a child might inherit an allele for dimples from their father's chromosome and an allele for smooth skin from their mother's chromosome.
During meiosis, specifically in prophase I, homologous chromosomes pair up to form tetrads, and in metaphase I, they align at the cell's equator before being separated into different gametes. This process ensures that each gamete receives one chromosome from each homologous pair, resulting in the genetic diversity found in sexual reproduction.