One mapping is selected at random from all the mappings from the set S = {1,2,3,...n} into itself. The probability that the selected mapping is one to one is

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#Question id: 15409

#Unit 8. Inheritance Biology

 A heterozygous trihybrid corn plant is testcrossed and the following progeny are produced (all traits are recessive to their wildtype alternative);

          booster                              6

          booster, silkless                  137       

          booster, liguleless, silkless      291

          liguleless                          142

          liguleless, silkless                  3

          silkless                            30

          booster, liguleless                  34

          wildtype                            339

What is the order of the loci on the chromosome? 

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#Question id: 1061

#Unit 4. Cell Communication and Cell Signaling

Specialized transduction

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#Question id: 5637

#Unit 5. Developmental Biology

In an experiment, Sperm from mice carrying loss-of-function mutations in the Izumo gene. Which of the following statement is correct?

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#Question id: 7240

#Unit 5. Developmental Biology

Given below are the list of some organism (column A) and determination of their dorsal-ventral axis (column B)

S.No.	Organism (Column A)	S.No	Determination of dorsal ventral axis (Column B)
A.	Chick	i.	sperm entry point and cortical rotation lead to specification of dorsal side opposite the point of sperm entry
B.	Zebrafish	ii.	initial symmetry-breaking event unknown. Localization of maternal Ndr1 and nuclear b -catenin species dorsal side and position of organizer
C.	Xenopus	iii.	interaction between inner cell mass and trophectoderm
D	Mouse	iv.	posterior marginal zone specifies ventral end of dorso-ventral axis

 Choose the correct option:

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#Question id: 13196

#Unit 1. Molecules and their Interaction Relevant to Biology

 In The Mica Experiment Dnase I enzyme cleaves