41. The PAGE profile of certain marker associated with X chromosome was investigated for Klinefelter syndrome and results are shown below, it suggest that the non- disjunction of chromosome occurred […]
Tag: CSIR NET Life Science Previous Year Questions and Solution Genetics
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CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Which syndrome shows aneuploid females with only one X chromosome?
40. Aneuploid females with only one X chromosome is a characteristic of individuals with (1) Cri du chat syndrome (2) Klinefelter syndrome (3) Down syndrome. (4) Turner syndrome. Concept “Aneuploid […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Turner syndrome and its chromosomal basis
39. Turner syndrome results from (1) Monosomy of sex-chromosome. (2) monosomy of autosome. (3) nullisomy of sex-chromosome. (4) trisomy Of autosome. Explanation: Turner syndrome is typically associated with karyotype 45,X, […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why two aneuploid and two normal haploid gametes arise from one meiosis
38. If a gamete produced following non disjunction of a chromosome at second meiotic division was fertilized by a normal gamete, what is the expected frequency of trisomic progeny? (1) […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why some meioses give two normal haploid and two aneuploid gametes
37. A cell undergoing meiosis produces four daughter cells, two of which are aneuploids, while two are haploid. This can occur due to: (1) Non-disjunction during first meiotic division only […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Gamete types produced when nondisjunction occurs in meiosis I
36. What kind of aneuploid gametes will be generated if meiotic non-disjunction occurs at first division? (‘n’ represents the haploid number of chromosomes) (1) onlyn + 1 and n (2) […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Gamete types produced when nondisjunction occurs in meiosis I
35. If non-disjunction occurs in meiosis I, Which of the following scenario is most likely to occur? (1) Two gametes will be n+1 and two will be n-1 (2) one […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why meiosis can produce n, n+1 and n–1 gametes
34. Meiosis produces n, n+l and n-1 gametes. The probable reason is? (1) Non-disjunction during metaphase I (2) Non-disjunction during metaphase-II (3) Non-disjunction during metaphase I and II (4) Non-disjunction […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Why fusion of a normal gamete with a gamete lacking one chromosome causes aneuploidy
33. A zygote formed by a fusion of one normal gamete another gamete lacking one due to failure of proper segregated at Anaphase-II will lead into chromosomal aberrations known as […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Cause of autosomal and sex chromosome trisomy in human males
32. In human males, autosomal and sex trisomy mains occurs due to- (1) Error in meiosis (2) Non-disjunction of chromosome (3) Dominant Y chromosome (4) Faulty Repair mechanism Option-wise explanation […]
