Flea Pupa. The flea larvae spin cocoons around themselves in which they move to the last phase of the flea life cycle and become adult fleas. The larvae can remain in the cocoon anywhere from one week to one year. Temperature is one factor that determines how long it will take for the adult flea to emerge from the cocoon.
Nondisjunction causes chromosomal disorders because sometimes an error in meiosis occurs when homologous chromosomes fail to separate which results in the organism receiving t â¦ he wrong number of chromosomes thus having a chromosomal disorder. 14 people found this useful.ondisjunction causes chromosomal disorders because sometimes an error in meiosis occurs when homologous chromosomes fail to separate which results in the organism receiving t â¦ he wrong number of chromosomes thus having a chromosomal disorder. 14 people found this useful.
Numerical abnormalities (aneuploidy from GHR,) can occur with either the autosomes or the sex chromosomes. Monosomy is the absence of a chromosomal region or entire chromosome resulting in only one copy of the genetic material.ex chromosome Aneuploidy: Turner syndrome (45,X). Turner syndrome (45,X) is caused by complete or partial absence of the second sex chromosome. Approximately 50% have complete loss of the second sex chromosome.