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) […]
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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 […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Karyotype of a phenotypically normal female with 47 chromosomes
31. A female with 47 chromosomes have normal phenotype. Her chromosome complements will be- (1) 44 + XXY (2) 44 + XXX (3) 45 + xx (4) 44+ XYY Concept […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Key features of Robertsonian translocations and how they are detected
30 Whith of the following statements are true Robertsonian translocations? A. The size of the non-homologous chromosome involved in translocation will differ. B. Genes on the chromosome involved in translocation […]
CSIR NET Life Science Previous Year Questions and Solution on CHROMOSOMES ABERRATIONS
Which chromosomal condition shows one unpaired chromosome during meiosis?
29. During meiosis if one of the chromosome lack its homologous partner while all other chromosome are paired, such aberration is termed as (1) Haploidy (2) Monosomic (3) Trisomy (4) […]
