Fertilization
The way to create a zygote.
What is fertilization? The egg cell and sperm cell come together and their nuclei fuse.
The stage where homologous chromosomes exchange genetic information (and the name of this process).
What is prophase I? This is called synapsis, recombination, or crossing-over.
The two main stages of human prenatal development.
What are the embryonic (0-8 weeks) and fetal (8-38 weeks) stages?
The difference between how identical and fraternal twins come to be.
What is the division of the zygote (identical) vs. the fertilization of multiple eggs (fraternal)?
The method of fertilization used by most mammals during sexual reproduction.
What is internal fertilization?
The stage where homologous chromosomes are aligned by the spindle fibres along the equator of the cell.
What is metaphase I?
The month of development when the fetal heartbeat can be heard with a stethoscope?
What is the 4th month?
The main difference between the daughter cells of mitosis vs. meiosis.
What is the number of chromosomes? In mitosis, the daughter cells are diploid. In meiosis, they are haploid.
The method of fertilization used by most fish species?
What is external fertilization?
The stage where sister chromatids are guided to opposite poles of the cell by the spindle fibres.
What is anaphase II?
The purpose of the placenta.
What is to provide nutrients to the baby and remove waste?
The reason why synapsis or crossing-over is critical in meiosis.
What is the production of genetically unique gametes (and by extension, offspring)?
The major disadvantage of external fertilization.
What is that the zygotes could be easily lost or damaged?
Meiosis takes ________ cells and transforms them into ____________.
What is germ cells and gametes?
The month of development where brain waves are detectable.
What is the second month?
The major disadvantage of a long gestational period for species that reproduce via internal fertilization.
What is a greater opportunity for injury/ trauma/ death for the mother (and baby)?
The main difference between a gamete and a somatic cell.
What is the number of chromosomes? The gamete is haploid and the somatic cell is diploid.
The location where germ cells are produced.
What are the gonads (ovaries and testicles)?
The soonest a baby can be born and survive with the help of intensive care.
What is 23 weeks (>5.5 months)?
The minimum age that a premature baby can survive without intensive care.
What is 7 months of age?