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Feather patterns form through genetic and epigenetic controls, with cells self-organizing into periodic patterns.

Sheep and goat hair fibers are complex due to keratin-associated proteins, which are important for fiber properties and growth.

Keratin protein production in cells is controlled by a complex system that changes with cell type, health, and conditions like injury or cancer.

Improving maternal diets can prevent severe health issues, including death, from goiter in goat kids.

Hairlessness in mammals is due to complex genetic changes in both genes and regulatory regions.

The study found that the protein Dkk4 helps regulate hair growth by controlling Wnt signaling in mice.

Cat claws stay sharp by shedding their outer layer through microcracks formed during activities.

Bioengineering can potentially treat hair loss by regenerating hair follicles and cloning hair, but the process is complex and needs more research.

Boreal caribou in northeastern British Columbia have significant health issues, including infections, tick infestations, and mineral deficiencies.

Scaffold-based strategies show promise for regenerating hair follicles and teeth but need more research for clinical use.

Foxn1 gene regulation is crucial for thymus development but not for hair growth.

The review concludes that innovations in regenerative medicine, tissue engineering, and developmental biology are essential for effective tissue repair and organ transplants.

Nanomaterials can improve hair care products and treatments, including hair loss and alopecia, by enhancing stability and safety, and allowing controlled release of compounds, but their safety in cosmetics needs more understanding.

Human hair loss may have evolved to help increase brain size.

A new goat gene affects cashmere fiber thickness; certain variations can make the fibers coarser.

Physical inactivity is a primary cause of many human illnesses.

Fish teeth and taste bud densities are linked and can change between types due to shared genetic and molecular factors.

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

Fadrozole and finasteride change gene expression related to sex hormones and thyroid hormones in frog larvae development.

Minoxidil 2% effectively treats female hair loss, promoting growth and density.

DHT affects testicular development and regulates spermatogenesis in some fish.

The document concludes that understanding health requires considering evolutionary perspectives on reproductive fitness, and recognizing the complexity of factors like diet, testosterone, and sexual orientation.

Men and women have different levels and production of brain steroids, which may affect their risk for certain brain disorders.

Nicotiana tabacum has potential therapeutic uses but also poses toxic risks.

Keratin proteins are crucial for hair growth and structure.