What is a chromosome?

Structure and Replication00:01:03

A chromosome consists of two identical sister chromatids connected by a centromere. These chromatids are created during the S phase of interphase and are separated into new daughter cells during mitosis.

Definition and Function of Chromosomes00:00:00

Chromosomes are structures located within the nucleus of eukaryotic cells that house DNA. This DNA acts as a genetic blueprint, containing genes that provide instructions for protein production and determine physical traits like hair and eye color.

Chromosome Formation00:00:46

During the prophase stage of mitosis, long strands of DNA condense by coiling around histone proteins to form visible, X-shaped structures known as chromosomes.

Karyotypes and Homologous Chromosomes00:01:52

A karyotype displays homologous chromosomes, which are pairs consisting of one chromosome from each parent. Humans possess 23 pairs, totaling 46 chromosomes, containing the same genes but potentially different alleles for traits.