Evidence that crossing over occurs at four stranded stage and not at two stranded stage of chromosom

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4.Principles of Inheritance and Variation

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The evidence that crossing over occurs at four stranded stage and not at two stranded stage of the chromosomes, comes from

$2 : 2 : 2 : 2$ arrangement of ascospores in Neurospora

$4 : 4$ arrangement of ascospores in Neurospora

Studies of meiosis in maize

Studies on linkage maps of chromosomes in Drosophila

Solution

(a) In Neurospora it produces $4$ types of ascospores two of one parental type, two of other parental type, two of one recombinant and another two of second recombinant type.

Standard 12

Biology

A fruit fly is heterozygous for sex-linked genes when meted with normal female fruit fly, the males specific chromosome will enter egg cell in the proportion

normal

(AIPMT-1997)

Improvement of genetic characters and present day generation on the basis of best nutrition and training is called

normal

Animal which remains male initially, then changes to female $(Tapeworm\, proglottides)$ is called

normal

(AIPMT-1993)

In garden pea, starch is synthesised effectively in

normal

At what temperature the blood is stored in bottles

normal

The evidence that crossing over occurs at four stranded stage and not at two stranded stage of the chromosomes, comes from

Solution

Similar Questions

A fruit fly is heterozygous for sex-linked genes when meted with normal female fruit fly, the males specific chromosome will enter egg cell in the proportion

Improvement of genetic characters and present day generation on the basis of best nutrition and training is called

Animal which remains male initially, then changes to female $(Tapeworm\, proglottides)$ is called

In garden pea, starch is synthesised effectively in

At what temperature the blood is stored in bottles

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