The change in the protein from the Awake form to the recessive narcolepsy form most likely...

The change in the protein from the Awake form to the recessive narcolepsy form most likely arose in ancestral Labs __________.

A.		as a result of a random DNA mutation in Lab gametes (eggs or sperm)
B.		as a result of Lab breeders choosing to breed only dogs that preferred sleeping to retrieving
C.		because Labs were tired and wanted to sleep more
D.		as a result of damage to Labs in fights with water snakes
E.		as a result of increased release of the Awake protein from vesicles in the synapse

Expert Solution

The change in the protein from the Awake form to the recessive narcolepsy form most likely arose in ancestral Labs :-

A. as a result of a random DNA mutation in Lab gametes (eggs or sperm).

The awake form of protein is the dominant form which is secreted in vesicles as a result of which the organism is awake or narcolepsy is prevented. But if there is mutation which leads to change in the dominant to recessive narcolepsy form. The random Mutation can either occur either in male gametes (Sperm) or female gametes (Eggs).

?C and D options are totally incorrect as the explaination are not true.

?The option B which states that the lab breeders choose to breed dogs that preferred sleeping to retrieving is also incorrect as this trait is recessive and usually not favoured.

?The option E is also incorrect as, if there is Increased release of awake protein from vesicles in the synapse then there will be no narcolepy. So it is just the opposite what is mentioned in the question.

Options B, C, D, E are incorrect.

So the correct answer is A.

gladiator answered 2 years ago

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