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Hair in mammals likely evolved from glandular structures, not scales.

Reptilian scales, feathers, and hairs evolved from changes in skin cell interactions.

Hairless mammals have genetic changes in both their protein-coding and regulatory sequences related to hair.

The conclusion is that grasping how cells determine their roles through evolution is key, with expected progress from new research models and genome editing.

Trichophyton bullosum has been found causing severe skin infections in donkeys in North Africa for the first time since 1933.

Different ectodermal organs like hair and feathers regenerate differently, with specific stem cells and signals involved in their growth and response to the environment.

The hair follicle is a great model for research to improve hair growth treatments.

The article concludes that better understanding gene regulation related to seasonal changes can offer insights into the mechanisms of seasonal timing in mammals.

Cat color patterns are determined early in development by gene expression and epidermal changes, with the Dickkopf 4 gene playing a crucial role.

The document concludes that "Dictamnus" has a rich cultural history and potential as a herbal medicine, warranting more research into its effects and safety.

Sex hormones, especially estradiol, can change chicken feather shapes and colors.

Redheaded people have higher levels of a vitamin D precursor, suggesting red hair may be an adaptation for better vitamin D synthesis in areas with less sunlight.

Ancient DNA blocks are still present in human genomes, possibly due to advantages they provide.

Researchers found genes that control hair color and growth change before the visible coat color changes in snowshoe hares.

The study found that certain genes are important for hedgehog skin appendage development and immunity, with spines possibly evolving for protection and infection resistance.

Msx and Dlx genes are crucial for development, controlling cell behaviors like growth and differentiation through their roles as gene regulators.

Genes related to keratin, skin cell differentiation, and immune functions are key in hedgehog skin and spine development.

Thyrotropin-Releasing Hormone helps heal wounds in frog and human skin.

Researchers identified genes and proteins that may influence wool thickness in sheep.

Hair health depends on various factors and hair loss can significantly affect a person's well-being; understanding hair biology is key for creating effective hair care treatments.

Plant root hair growth is mainly controlled by hormones like auxin and ethylene, which promote growth, while others like brassinosteroid inhibit it.

Key genes linked to hair growth and cancer were identified in hairless mice.

Recent selection on immune response genes was identified across seven ethnicities.

Experiments can shape how feathers grow and develop.

FGF5 gene mutations cause long hair in domestic cats.

BMP signaling is essential for the development of touch domes.

As skin cells mature, vitamin D receptor levels decrease while retinoid X receptor α levels increase.

Certain miRNAs are linked to chicken feather development.

Environmental factors can cause mutations in skin proteins, leading to skin disorders.