sister chromatids are formed in the S phase of the cell cycle when the chromosomes undergoes replication sister chromatids are formed when the prokaryotic circular chromosomes attaches at the plasma membrane sister chromatids are attached to each other at their centromere nondisjunction can only produce gametes with extra chromosomes, not missing chromosomes errors in chromosomes segregation can occur in either the first or second meiotic division in normal meiosis, when do homologous chromosomes separate from each other in the first meiotic division what is nondisjunction? failure of chromosomal separation if nondisjunction occurs in the first meiotic division, how many of the four possible gametes produced from meiosis will have the wrong number of chromosomes? 4 in which type of nondisjunction could the two copies of a chromosome in a gamete be heterozygous? nondisjunction in the first meiotic division the process of cell division in a prokaryotic cell is called : binary fission which statement represents a misconception about sister chromatids? down syndrome is caused by errors in fertilization down syndrome is the one inherited disorder that results from an extra copy of an entire chromosome errors in chromosomes segregation can occur in either the first or second meiotic division box A in the figure, which box contains some gene variants (alleles) from one parent and some from the other, but not variant alleles from the same gene? box B in the figure, which box contains only single gene copies from one of the parents?
box C in the figure, which box encloses gene variants (alleles) of the same genes from both parents? circle B in the figure, which box encloses two copies of the same gene variants (alleles) from only one of the parents? which circle is likely to contain both paternal and maternal gene variants (alleles)?
In the image, let the light shade indicate maternally derived chromosomal material and the dark shade indicate paternally derived material.
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