Cell Division - Meiosis

During meiosis, the genome of a diploid germ cell, which is composed of long segments of DNA packaged into chromosomes, undergoes DNA replication followed by two rounds of division, resulting in four haploid cells. Each of these cells contain one complete set of chromosomes, or half of the genetic content of the original cell. If meiosis produces gametes, these cells must fuse during fertilization to create a new diploid cell, or zygote before any new growth can occur. Thus, the division mechanism of meiosis is a reciprocal process to the joining of two genomes that occurs at fertilization. Because the chromosomes of each parent undergo genetic recombination during meiosis, each gamete, and thus each zygote, will have a unique genetic blueprint encoded in its DNA. Together, meiosis and fertilization constitute sexuality in the eukaryotes, and generate genetically distinct individuals in populations

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Education

[Conzillla]

VERY VAGUE 

[1091Floyd21]

If each haploid cell of an individual produces contains 23 different types of chroosomes because it is given one chromosome from each pair, then to me it seems only one type of haploid cell can be produced, & this is not so; how come???

During sex, there is therefore a possible of 43 chromosomes to be passed on to the child. On;y 23 of these can be selected. Can anyone tell me how they are selected???