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.
Nondisjunction is the result of failure of chromosomes to separate during mitosis. This leads to new cells with either extra or missing chromosomes; a condition called aneuploidy. Human embryos with aneuploidy rarely survive development; with only 0.3 percent of human aneuploidy pregnancies producing a live birth.