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Due to nondisjuction of chromosomes dur...

Due to nondisjuction of chromosomes during spermatogenesis some sperms cary both sex chromosomes (22A+XY) while others do not carry anysex chromosome (22A+O).If these sperms feticlize normal eggs (22A+X), What type of genetic disorders appear among the offspering

A

Turner 's syndrome and klinefetlter's syndrome

B

Down's syndrome and Klinefetlter 's syndrome

C

Down 's syndrome and Turner 's sysndrome

D

Down's syndrome and cri-du-chat syndrome.

Text Solution

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The correct Answer is:
A
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Due to the nondisjunctiuon of chromosomes during spermatogenesis, sperms carry both sex chromosomes (22A + XY) and some sperms do not carry any sex chromosome (22A + O). If these sperms fertilise normal eggs (22A + X), what types of genetic disorders appear among the offsprings ?

Due to nondisjunction of chromosomes during spermatogensis, some sperms carry both sex chromosomes (22A + XY) and some sperms do not carry any sex chromosome (22A + O). If these sperms fertilise normal eggs (22A + X), what types of genetic disorders respecitively appear among the offspring ?

Due to nondisjunction of chromosomes during spermatogenesis , sperms carry both sex chromosomes ( 22A +XY ) and some sperms do not carry any sex chromosomes ( 22A+ X ) , what types of genetic disorder appear among the offsprings ?

Assertion :-In o graasshopper, some of the sperms bear X-chromosome whereas some do not. Reason :- Grasshopper is an example of XX-XY type of sex determination.

Which of the following statement for the grasshopper is incorrect ? (1) Male individual is heatrogametic due to two heteromorphic sex chromosomes (2) Sperm determines the sex of offsprings (3) Similar number of autosomes are found in male and female individuals both (4) All eggs contain autosomes as well as X-chromosome.

State True or False (w.r.t. following diagrams) (i) During gamete formation, only 50 % of the sperm bear X-chromosome. (ii) Both male and female individuals have same type of sex chromosomes.