Name: Dharmanad
Status: Student
Grade: Other
Location: CA
Country: United States
Date: June 2006
Question:
Why can't animals produce their offsprings only with
a male cells{two haploid male gametes}, since both male and female
cells has the same characteristic genome except the Y- chromosome.
in other words can we produce life without the help of uterus and egg?
Replies:
If we used " two male gametes" and could manage to get them to combine into
a diploid compliment, ask yourself what the egg gives that is still missing.
I will give you a hint...it is a bean shaped organelle handed down through
only the egg cell...not sperm...and it has its own happy single chromosome
and generates most of the energy in a typical animal cell and if that isn't
enough hints....it begins with mit and ends with ochondria.
Pf
Sperm don't carry mitochondria which are necessary for cellular metabolism,
and they don't carry nutrients (like the egg white and yolk in a chicken
egg) that are necessary for the developing embryo until the fertilized egg
becomes imbedded in the uterine lining.
Ron Baker, Ph.D.
The egg is so much larger than the sperm cell because it carries the cytoplasm and
organelles necessary to begin growth and cell division. The female contributes much
more to the individual at fertilization including mitochondria DNA. The male does
not provide half of what the developing zygote needs, the ova contributes much more!
Qva can be stripped and used to fertilize another ova, but sperm is not equipt to
do the same.
Steve Sample
A sperm is basically just a nucleus with a tail. There is very little
cytoplasm and virtually no organelles.
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