Genetics

Health

Eye color depends mainly on melanin in the iris. Higher melanin levels typically produce brown eyes, while lower levels allow more scattered light, resulting in green, gray, or...

genetics

FF commonly refers to the homozygous wild‑type or normal functional genotype at a given gene locus, while ff usually denotes a homozygous variant or loss‑of‑function genot...

society-culture

This page explains what race means, how the term is used in science and society, and why the concept remains important and sometimes controversial. You will find definitions, hi...

Science & Education

Nucleotides are the fundamental building blocks of DNA and RNA, encoding genetic instructions and powering cellular metabolism. The five primary nucleotide bases that define gen...

health-and-medicine

Hazel eyes affect roughly 5–15% of the global population, making them less common than brown but more frequent than green or blue. People with hazel eyes typically show a mix...

biology

DNA replication is the process by which a cell makes an exact copy of its genome before division. During this process, the double helix unwinds, each strand serves as a template...

genetics

In genetics, heterozygous describes an individual who has two different alleles at a specific gene locus—one inherited from each parent. For example, if a gene has a dominant...

genetics

Heterozygous describes a condition in which an individual carries two different alleles for a specific gene locus, one inherited from each parent. In a heterozygous genotype, th...

Health

Eye color is primarily set by genetics, specifically by multiple genes that control melanin production and placement in the iris. Melanin is a brown pigment; higher amounts and...

anatomy-and-physiology

Some people can move their outer ears by wiggling the earlobes or pinna, while others cannot. This ability depends on variations in ear muscles, nerve control, and genetics, and...