Describe what happens during prophase i and metaphase i and how these phases play an important role in the genetic diversity of the daughter cells produced.

During Prophase I, the genetic material condenses and form chromosomes pairs (homologous chromosomes) and spindle begin to form. It is during this phase that the process of crossing over happens-this means that the homologous chromosomes arms exchange genetic material at certain points. This results in genetic variations.

During metaphase I, the homologous chromosomes are aligned at the metaphase plate and the spindle fibers are attached to the kinetochore of each sister chromosomes and begin pulling towards the poles.  If this process does not complete, then there are chances of resulting daughter cells to have aneuploidy – have extra chromosomes that would cause disorder like downs syndrome.  

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

substitution is the answer in this case