Research any phenotype (genetically controlled trait) that has several versions (alleles) in humans. For example, humans can either have dimples or not. Explain the versions and tell which is dominant and which is recessive.

when a human has dimple,the gene is either homologous or heterozygous dominantand if the person doesn't not have dimple...he or she has a homologous recessive gene on the chromosome

Slow-twitch

Explanation:

Red meat is rich in slow-twitch muscle fibers. The slow-twitch muscle fibers are rich in myoglobin and blood capillaries. They also have many large mitochondria to generate ATP by aerobic respiration.

These fibers are slow-twitch fibers as the ATPase in myosin head carries out the hydrolysis of ATP at a slower rate causing a slower contraction cycle.

Slow-twitch fibers appear red due to a large amount of myoglobin and a rich network of blood vessels. They are capable of prolonged contractions and are fatigue resistant.