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Albinism is a genetic mutation that results in some animals being born without the enzyme that produces the pigment for skin and eye color. All BUT one statement is a possible explanation for this mutation. Which is NOT an explanation?

2 Answers

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Answer:

D) The organism gained an extra chromosome because of a non-disjunction.

Step-by-step explanation:

The organism gained an extra chromosome because of a non-disjunction. This would likely cause other mutations to appear. This explanation would not cause the organism to be missing the gene needed for pigment.

User Kevin Ternet
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The given question is incomplete. The complete question is:

Albinism is a genetic mutation that results in some animals being born without the enzyme that produces the pigment for skin and eye color. All BUT one statement is a possible explanation for this mutation. Which is NOT an explanation?

A) A DNA base in the gene for the enzyme was removed. B) A DNA base in the gene for the enzyme was substituted. C) The wrong mRNA code caused the wrong protein to form. D) The organism gained an extra chromosome because of a non-disjunction.

Answer:

D) The organism gained an extra chromosome because of a non-disjunction.

Step-by-step explanation:

Albinism is a genetic disorder and is caused by a genetic mutation. A mutation that changes one or more bases in the gene is called substitution mutation. A substitution mutation in the gene for pigment production may result in the synthesis of non-functional or less functional pigments and thereby causing albinism.

Similarly, the deletion of one or more bases from the gene for pigment production would also result in the synthesis of a faulty protein. Incorporation of wrong amino acids in the protein by misreading the mRNA codon would result in the production of faulty pigment molecules.

However, a mutation that adds one extra chromosome to the genome of the organism due to non-disjunction of chromosomes during anaphase would not affect the gene for the pigment and thereby cannot cause albinism.

User Awongh
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