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Vestigial Organs

Attached ear ...

Question

Attached ear lobe in humans is

A

Recessive trait

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B

Dominant trait

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C

Homozygous trait

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D

Heterozygous trait

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Solution

The correct option is A Recessive trait
Some people have their ear lobes attached to the side of the head and some people have free ear lobes. This is due to a gene that is dominant for unattached earlobes and recessive in the case of attached earlobes. So, attached ear lobes are recessive in humans. Thus, the correct answer is option A.

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Q. Attached ear lobes is an autosomal recessive trait. Given pedigree shows the inheritance of attached ear lobes. If couple I-1 and I-2 had a fourth child, what would be the probability of that child to have attached ear lobes?

संलग्न कर्ण पल्लव एक अलिंग गुणसूत्री अप्रभावी लक्षण है। दी गयी वंशावली संलग्न कर्ण पल्लव की वंशागति को दर्शाती है। यदि दंपति I-1 और I-2 को चौथा बच्चा होता है तो उस बच्चे में संलग्न कर्ण पल्लव की संभावना कितनी होगी?

Attached earlobe is a recessive trait.

Q. If parents have free ear lobes and the offspring has attached ear lobes, then the parents must be

Q. Fused ear lobes appear En the progeny due to an autosomal recessive gene. Work out the genotypes of members in the given pedigree.

Q. Which are some of the dominant and recessive traits in human beings?

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