Please answer ALL QUESTIONS. Please and thank you! Assume that the allele for cu

Question

Please answer ALL QUESTIONS. Please and thank you!

Assume that the allele for curly tail is completely dominant to the allele for straight tail for an X-linked maternal effect gene. Which of the following can be true? A) A straight tailed male must have a straight tailed mother. B) A male with a curly tail received a straight tail allele from his mother C) A mother with a straight tail cannot have progeny with curly tails. D) In order for a female to be curly tailed, her father must be curly tailed.

Explanation / Answer

1. An maternal effect occurs when the phenotype of an organism is determined by the genotype of its mother.

The answer would be A mother with straight tail cannot have a progeny with curly tails.

2. Maternal effect is caused by the genes in the mitochondrial gene. The genotype of mother decides the genotype of the offspring.

3. Non mendelian inheritance in which traits do not segregate in accordance with mendel's law. The offsprings phenotype is all dependent on the phenotype. So offspring turns out to look like maternal parent rather than paternal parent.

4. As the wing phenotype is decided by the maternal imprintable genes, to know the phenotype of male, know the mother's genotype.

5. Heterozygous couple who are normal, but the mother is carrier for BWS. The probability of the next child to be carrier of BWS would 1/4 or 25%.

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