Presence of only one copy of the X chromosome in males (XY) of some species produces a condition called _____ ? haploinsufficiency ? hemizygosity ? lethality ? haploidy ? monosomy
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Step 1: Haploinsufficiency refers to a situation where a single copy of a gene is not sufficient to produce the normal phenotype. Show more…
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A man is found to have a karyotype of 47, XXY. The presence of an extra X chromosome could NOT result from non-disjunction in a paternal meiocyte at meiosis I non-disjunction in a maternal meiocyte at meiosis II non-disjunction in a paternal meiocyte at meiosis II non-disjunction in a paternal meiocyte at meiosis I Any of the four possible non-disjunction events could give rise to a 47, XXY male.
Adi S.
sex chromosome chiasma autosome B. homologous chromosomes pair of chromosomes carrying genes for same characters chromosomes besides X and Y sex cells D. X and Y location of crossover gametes chromosomes that result from crossover Klinefelter's syndrome chromosome(s) not moved to proper cell in meiosis trisomy 21 nondisjunction of an autosome H. Turner's syndrome individual has XXY nondisjunction individual has XO recombinants
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