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they have 7 toes. The protein is called sonic hedgehog or SHH. The number of toes depends on their exposure to the protein. Normally, there is only SHH on one side of the foot, but extra-toes cats have it on both sides of their feet, so they have extra toes.

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they have 7 toes. The protein is called sonic hedgehog or SHH. The number of toes depends on their exposure to the protein. Normally, there is only SHH on one side of the foot, but extra-toes cats have it on both sides of their feet, so they have extra toes.

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(RED HAIR) Both because people with variations of MC1R (along with at least 11 other genes) contribute to differences in hair and skin color. But redheads are at a high risk of getting skin cancer.

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(RED HAIR) Both because people with variations of MC1R (along with at least 11 other genes) contribute to differences in hair and skin color. But redheads are at a high risk of getting skin cancer.

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jaguars,dark whiptail lizards, and many bird species 

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jaguars,dark whiptail lizards, and many bird species 

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RED HAIR

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Only 1-2% around the world. It's more common in Scotland and Ireland, where about 10-13% are redheads. Redheads normally have pale skin, light eyes and freckles.When different hormones inactivate the MC1R receptor. When MC1R When it's inactive, they make red pigments.Most redheads have one of three single-base variations in the MC1R gene. Each changes a single amino acid and affects how much MC1R gets to the cell surface and how it responds to signals.

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Only 1-2% around the world. It's more common in Scotland and Ireland, where about 10-13% are redheads. Redheads normally have pale skin, light eyes and freckles.When different hormones inactivate the MC1R receptor. When MC1R When it's inactive, they make red pigments.Most redheads have one of three single-base variations in the MC1R gene. Each changes a single amino acid and affects how much MC1R gets to the cell surface and how it responds to signals.

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RED HAIR

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The affected protein in redheads is MC1R (melanocortin 1 receptor). MC1R sits in the membrane of specialized skin cells that make pigments. Pigments give skin and hair their color. Different hormones activate or inactivate the MC1R receptor. When MC1R is active, cells make black pigments. When it's inactive, they make red pigments.

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The affected protein in redheads is MC1R (melanocortin 1 receptor). MC1R sits in the membrane of specialized skin cells that make pigments. Pigments give skin and hair their color. Different hormones activate or inactivate the MC1R receptor. When MC1R is active, cells make black pigments. When it's inactive, they make red pigments.

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dark whiptail lizards,many bird species, and jaguars

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dark whiptail lizards,many bird species, and jaguars

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Shar Pei Dog: Both. Beacuse this variation in skin architecture is not a health problem. However hyaluronan can cause an immune response, leading to skin inflammation and fever.

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Shar Pei Dog: Both. Beacuse this variation in skin architecture is not a health problem. However hyaluronan can cause an immune response, leading to skin inflammation and fever.

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Shar Pei Dog: Hyaluronan Synthase 2. It is an enzyme that sits in the membrane of skin cells. It builds a large molecule called hyaluronan (HA) and releases it outside the cell. 

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Shar Pei Dog: Hyaluronan Synthase 2. It is an enzyme that sits in the membrane of skin cells. It builds a large molecule called hyaluronan (HA) and releases it outside the cell. 

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variation

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The cat grow 2 extra toes on the thumb side of the paw

This is the SHH gene it allows fingers and toes to be made depending on how much of the gene they are exposed to. The cat can grow 7 toes because the cat has the gene exposed on both sides and not just one side, so extra toes grow.

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All vertebrates can have this disease, this can cause humans to have 2 thumbs, also  mice, cats, and chicken can all have extra toes.

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Extra toed cats: What the protein is called and how it works. (Summarize the Protein and DNA sections)The protein is called SHH(Sonic hedgehog) and it is made by cells. There's a single-base change outside of the protein-coding and the SHH gene makes a new switch that turns the SHH gene on the other side of the foot. For mitten cats, they make SHH protein on both sides of the foot causing to make extra toes. 

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Extra toed cats: What the protein is called and how it works. (Summarize the Protein and DNA sections)The protein is called SHH(Sonic hedgehog) and it is made by cells. There's a single-base change outside of the protein-coding and the SHH gene makes a new switch that turns the SHH gene on the other side of the foot. For mitten cats, they make SHH protein on both sides of the foot causing to make extra toes. 

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They have double the muscle and half the fat as other breeds of cows. the protein is called myostatin. Normally, myostatin attaches to a pair of receptors on a muscle cell to tell it to stop growing the cell. These cows don’t have enough myostatin or even any at all so their muscles keep growing

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They have double the muscle and half the fat as other breeds of cows. the protein is called myostatin. Normally, myostatin attaches to a pair of receptors on a muscle cell to tell it to stop growing the cell. These cows don’t have enough myostatin or even any at all so their muscles keep growing