Genes are pieces of DNA that hold information passed down from parents to their children. They help decide how living things look and function.
Humans have about 20,000 to 25,000 genes, which are found in 23 pairs of chromosomes.
Alleles are different versions of a gene. For example, the gene that controls eye color can have many alleles. This is why people can have blue, brown, or green eyes.
Genetic Variation: Alleles create differences between people. This is important because it helps living things adapt and evolve over time.
Trait Expression: The specific combination of alleles someone has decides their traits, like hair color or height. For example, if someone has two of the same alleles (like or ), they might show different traits than someone with two different alleles (like ).
Hereditary Disorders: Learning about genes and alleles helps us find genetic disorders. There are over 6,000 known disorders! This knowledge can also help doctors figure out treatment options.
Genes are pieces of DNA that hold information passed down from parents to their children. They help decide how living things look and function.
Humans have about 20,000 to 25,000 genes, which are found in 23 pairs of chromosomes.
Alleles are different versions of a gene. For example, the gene that controls eye color can have many alleles. This is why people can have blue, brown, or green eyes.
Genetic Variation: Alleles create differences between people. This is important because it helps living things adapt and evolve over time.
Trait Expression: The specific combination of alleles someone has decides their traits, like hair color or height. For example, if someone has two of the same alleles (like or ), they might show different traits than someone with two different alleles (like ).
Hereditary Disorders: Learning about genes and alleles helps us find genetic disorders. There are over 6,000 known disorders! This knowledge can also help doctors figure out treatment options.