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March 26, 2017

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Suppose that during meiosis I, the paternal chromosomes always went to one pole and the maternal chromosomes always went to the other pole. How would this affect the genetic variability of the offspring? Would children tend to look more like the parents? Why?

  • Biology Genetics - ,

    The sperms would then reflect the genetics received from each paternal grandparent, one set from paternal grandpa and one from paternal grandma, as it was in the conception of the father.

    However, would you have that same factor in the development of the ovum, or would there be normal variability?

    Would the offspring tend to look more like the parents or the paternal grandparents?

    I hope this helps you in thinking this out. Thanks for asking.

  • Biology - ,

    Wouldnt the ovum be the same as the sperm, only from the mother instead?

    And the offspring would tend to look like the paternal grandparents then?

  • Biology Genetics - ,

    You have only indicated what is supposed to happen within the testes of the male parent in your question. There is no indication of what is happening in the ovaries of the female parent.

    In terms of looking like the parents, the children are still getting half of their genetics from each parent, regardless.

    Remember that the paternal grandpa sperm would essentially always have a Y chromosome, and the paternal grandma sperm would always have an X. It would seem that the male siblings would look more like each other, and the female siblings would look more like each other, essentially like they are "half-twins" in this scenario. There would be less genetic variability within each gender.

    Yes, I believe they would look more like the paternal grandparents — girls like grandma, boys like grandpa.

    I hope this helps a little more. Thanks for asking.

  • Biology - ,

    thanks.

    What would happen if all the maternal chromosomes went to one pole though in meiosis?

  • Biology - ,

    "If all the maternal chromosomes went to one pole though in meiosis", would this mean that you would have either 46 or zero chromosomes in the ovum? Either way, the chances of viability (living/surviving) are lacking.

    The zygote would either have a diploid number of 23 or 69, both of which vary significantly from the diploid number for our species.

    I hope this helps. Thanks for asking.

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