An acentric fragment is an inversion crossover product lacking a centromere. . K

Question

An acentric fragment is an inversion crossover product lacking a centromere. . Karyotypes generally remain constant within a species because rearrangements and changes in chromosome number occur infrequently. 4. Changes in chromosome number include aneuploidy, monoploidy, polyploidy, and duplications. 75. Homozygosity for a deletion is often, but not always, lethal. 76. Recessive mutations can often be uncovered by deletions in heterozygotes. 77. Duplication of chromosomal segments rarely has an effect on the evolution of genomes. 78. Crossing-over within an inversion loop always produces unbalanced recombinant chromatids. 79. A hallmark of transposons is that their ends are inverted repeats of each other 80. Euploid cells contain only incomplete sets of chromosomes.

Explanation / Answer

Ans 72 True

Ans 73. True

Ans. 74 False

Ans 75. True

Ans 76 True

Ans. 77 True

Ans 78 False

Ans 79 False

Ans. 80 False

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