A scientist is studying the inheritance of two traits, red hair color and freckles. The genotypes...

A scientist is studying the inheritance of two traits, red hair color and freckles. The genotypes of both parents are TtGg. However, the reuslts of the cross deviate strongly from the characteristic 9:3:3:1 ratio. What can you conclude from this information?

		The scientist made a mistake in the experiment, because the law of independent assortment always holds during genetic crosses.
		The dominant trait is masking the effects of the recessive trait.
		The alleles for red hair color and freckles are not segregating and recombining independently.
		The law of segregation is being violated.
		The alleles for red hair color and freckles are segregating and recombining independently.

Solutions

Expert Solution

Answer - The alles for red hair color and freckles are not segregating and recombining independently

First option is absolutely incorrect because scientists do not make mistake in simple problems.

Second option if incorrect because nothing related to the expression of dominant and recessive trait is given in the question.

Third option is correct because if the ratio deviated drom the classical mendelian ratios, then it is violating the law of independent assortment. According to this law, alleles of different genes segregate independently of each other during gamete formation so that every gamete receives one allele of a gene. If the law of independent assortment is not followed, then the genes are dependent on each other.

Next option is incorrect because law of segregation is not violated. In fact law of independent assortment is violated.

Last option is incorrect because the law of independent assortment is violated.

Please give a good rating.

gladiator answered 1 year ago

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