Examples of Human Phenotype Phenotype and Genotype

Phenotype Examples in Humans

Hair Color: Hair color phenotypes include blonde, brown, black, red, and all shades in between. The quantity and kind of melanin pigment produced in the hair follicles regulates it.
Eye Color: There are many different eye color phenotypes, including brown, blue, green, hazel, and grey. The quantity and distribution of melanin in the iris define eye color.
Skin Color: Skin may have are many distinct types. It may be of very light color to extremely dark. The quantity of melanin that is produced by the skin’s melanocytes influences the color of the skin.
Height: Height phenotypes may be short to tall. Combinations of genetic, hormonal, and dietary factors all affect the height.
Body Type: Ectomorph (slim), Mesomorph (muscular), and Endomorph (rounded or heavy-set) are some phenotypes for body type. A combination of genetic and metabolic variables affects body type.
Fingerprints: Loop, whorl, and arch patterns are examples of fingerprint phenotypes. Each person’s fingerprints are distinctive and develop throughout fetal development.
Tongue Rolling: Tongue rolling phenotypes can be divided between those that can roll their tongues and those that cannot. Muscle structure and genetic factors influence it.
Earlobe Attachment: Earlobe attachment phenotypes may be of attached or free type. It is determined by genetics and the earlobe’s connective tissue structure.

Genetic makeup possessed by an individual is known as its genotype. Examples of genotypes in humans includes

Eye Color: The genotypes for eye color can vary, but let’s consider the most basic example. The gene for eye color has two main alleles:

Dominant “B” encodes brown color. So a person with genotype “BB” would have brown eyes.
Recessive “b” encodes blue color. Someone with a genotype “bb” would have blue eyes.
Blood Type: The ABO blood type system is determined by the presence or absence of certain antigens on the surface of red blood cells. The genotypes for blood types include:
Type A: AA or AO
Type B: BB or BO
Type AB: AB
Type O: OO

Hair Texture: The genotypes for hair texture can involve multiple genes. Let’s discussed simplified example. The gene for hair texture has two main alleles:
Dominant “T” for straight hair. Genotype “Tt” would have straight hair.
Recessive “t”codes curly hair. Genotype “tt” would results in curly hair.
Freckles: The presence or absence of freckles can be influenced by genetic factors. The genotypes for freckles can involve multiple genes. The gene coding for freckles has two main alleles:
Dominant “F” for freckles. A person with a genotype “FF” or “Ff” would have freckles,
Recessive “f” for no freckles. So genotype “ff” would not have freckles.
Tongue Rolling: The ability to roll the tongue is often considered a genetic trait. The genotypes for tongue rolling can involve multiple genes, but let’s consider a simplified example. The gene for tongue rolling has two main alleles:
Dominant “R” has the ability to roll the tongue. A person with a genotype “RR” or “Rr” would be able to roll their tongue.
Recessive “r” for the inability to roll the tongue. So a person with a genotype “rr” will not be able to roll their tongue.