Answer / abhilash

colchicine is a chemical substance which causes mutations.
colchicine is usually used to obtain polyploids.polyploid
means each cell consists of more than two sets of
chromosomes.

Answer / meenu

Colchicine is also used to convert mono(hap)loids into
diploids

Consider two linked autosomal genes. The dominant allele C of the first gene causes cataracts of the eye, whereas its recessive allele produces normal eyes. The dominant allele P causes polydactyly (an extra finger) whereas its allele (p) produces a normal number of fingers. A man with cataracts and normal fingers marries a woman with polydactyly and normal eyes. Their son has both polydactyly and cataracts and he marries a woman with neither trait. What is the probability that their first child will have cataracts and polydactyly?

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what happens in Postmeiotic segregation?

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In human beings, brown eyes are usually dominant over blue eyes. Suppose a blue-eyed man marries a brown-eyed woman whose father was blue-eyed. What proportion of their children would you predict to have blue eyes?

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What are teaspoons?

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How can cloning help or hurt farmers?

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what is Avian flu threat? what are its symptoms?

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Cystic fibrosis (CF) occurs with a frequency of about 1/2500 Caucasian newborns and is inherited as an autosomal recessive. A woman had an older sister die from complications of this disease. CF is not present among relatives of her husband. Both the woman and her husband have normal phenotypes. What is the chance this couple will have a CF child?

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how to represent "o" blood group?

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what is Punnett square ?

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what is the difference between back cross and test cross?

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what are the symptoms of Turner's syndrome ?

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what is Regeneration ?

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