A chromosome is a single, long molecule of DNA. These highly organized structures store genetic information in living organisms. Small sections of the chromosome, called genes, code for the RNA ...

This unmatched pair, known as the X and Y sex chromosomes, determines whether we are male (XY) or female (XX). A mother always provides a single X chromosome in her egg. Inherit an X from your ...

Within the rest of the genome are an estimated 70,000 genes. The single chromosome displayed here and those on the previous screen are shown in their most compacted state -- they're about to ...

Each human body cell contains 46 chromosomes. These can be arranged into 23 pairs. Each chromosome in a pair carries the same types of genes. The 23rd pair are the sex chromosomes: In females ...

Autoradiographs reveal that the bacterial chromosome is a single very long DNA molecule and show how it is duplicated When bacterial DNA is labeled with radioactive atoms, it takes its own picture.

The nucleus of a germline stem cell undergoes two divisions, firstly separating homologous chromosomes and secondly separating chromatids. Haploid gametes contain 23 single chromosomes.