48. Among the following which is probable cause of unequal results during the reciprocal crosses? (1) X-linked inheritance (2) polygenic inheritance (3) Mendelian Inheritance (4) Epitasis Unequal results during reciprocal […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Sex-linked genetic disorder where carrier mother loses all sons but all daughters survive
47. A well-known genetic disorder is carried by a woman. She marries a normal man and her all female child are alive but she tost all male child. Such a […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Genetic Causes of Male Baldness
46. Baldness of male is due to- (1) X- linked (2) Y-linked (3) Autosomal (4) Multifactorial Male baldness, particularly male pattern baldness (androgenetic alopecia), is best described as a multifactorial […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Complementation Test in Drosophila
A Drosophila mutant (line A) with vestigial wings is isolated in a laboratory. The vestigial wing phenotype was observed to be recessive and mapped to gene ‘X’. Three other laboratories […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Conditional Mutants in Drosophila Crossveinless Phenotype Exposed to Heat
44. A researcher exposed Drosophila larvae to 370C during their growth. One of the adult flies that emerged had a crossveinless phenotype. Crossveinless is a known mutant in Drosophila. When […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
X:A ratio, sex determination and Barr bodies in humans and Drosophila
The individuals considered in this question are having two haploid sets of autosomes and no Y. chromosome. The X:A ratio of the individuals, the type of organisms chosen, their primary […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Dosage Compensation in Mouse Chromosome Translocations Affecting Gene Expression
42. A male mouse cell line has a large translocation from X chromosome into chromosome 1. When a GFP containing transgene is inserted in this chromosome 1 with translocation, it […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
DNA Methylation
41. In context of DNA methylation, which one of the following statements is FALSE? (1) Generally, methylation occurs at the 3rd carbon position of cytosine and converts it to 3-methyl […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Criss-Cross Inheritance
40. Criss-cross inheritance is shown by- (1) Sex linked traits (2) Sex influenced traits (3) Sex limited traits (4) Autosomes Criss-cross inheritance is shown by sex-linked traits, specifically genes located […]
CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES
Understanding Maternal Effect in Mouse Gene ‘A’ Deletion Impact on Growth
Gene ‘A’ in mouse is needed for its normal growth [normal size). Mouse strains with deletion in gene ‘A’ (Adel) have been developed. When the following cross is made …..AdelA […]
