AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

GENE MUTATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Albinism in crocodiles is a mutation that causes a loss of color in the skin of the animal, making them appear white. Which of the following would most likely occur as a result of this mutation?
A
Albino crocodiles will catch food faster than other crocodiles as they are more visible.
B
Albino crocodiles will live longer than other crocodiles in the population due to the mutation.
C
Albino crocodiles may be easily hunted (by humans) and may have difficulty catching food as they cannot easily blend in with their environment.
D
Albino crocodiles can reproduce faster than other crocodiles due to their mutation.
Explanation: 

Detailed explanation-1: -The enzyme produced by the TYR gene, called tyrosinase, is required for the synthesis of melanin pigment. A mutation in the TYR gene causes the most common form of albinism. People with albinism have either a partial or complete lack of pigment, or coloring, in their eyes, skin or hair.

Detailed explanation-2: -Albino American Alligators lack the pigment melanin. They are the offspring of two normal-looking alligators that carry the recessive gene for albinism.

Detailed explanation-3: -Albinism is a genetic mutation that results in some animals being born without the enzyme that produces the pigment for skin and eye color.

Detailed explanation-4: -The most common form of ocular albinism is type 1. This type is passed down by a gene change on the X chromosome. X-linked ocular albinism can be passed on by a mother who carries one changed X gene to her son. This is called X-linked recessive inheritance.

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