5) the order of bases A Question 9 T, G, or C Question options 1 By the sister c

Question

5) the order of bases A Question 9 T, G, or C Question options 1 By the sister chromatids. 2) By the microtubule spindles. 3) By the mitochondria. 4) By the nucleolus Question 10 A human male has Question options: 1 aY from his mother and an X from his father 2) 2 X chromosomes, one from each parent. 3) an X from his mother and a Y from his father. 4) 5) an X and a Y, either of which could have come from either parent. two Y chromosomes, one from each parent. Question 19 A genetic disorder is Question options 1) always recessive.

Explanation / Answer

9)3

Homologous chromosomes are the chromosomes carry same genes at same loci one is maternal and another is paternal. During meiosis cell division both chromosomes are separated by microtubules,, these microtubules spindle are attached with the kinetochore of chromosomes. Microtubules are long protein fibers arise from the centrioles and attach pole to chromosome by kinetochore.

10)3

Human male carries two sex chromosomes XY

X- chromosome from his mother because females are XX can produce one Egg which have only X chromosome.

Y- chromosome from his father because male carry XY chromosome,, so produce sperm (50%have X chromosome, 50%have Y chromosome).

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