Haploid means ________________.
You have only HALF the chromosomes needed to be a particular organism.
What happens when the sperm that "won the race" enters the perivitelline space?
Chemical reactions will occur that harden the zona pellucida and prevent any other sperm from entering the egg.
The acrosomal reaction ________________.
allows enzymes in the sperm to digest away the fatty layers of the egg so it can get inside the egg.
***** are _________ because they contain _____________.
haploid / half the DNA = gametes / one set of chromosomes
The first layer of the unfertilized egg that a sperm will have to penetrate is known as the _______________.
corona radiata
The second layer, in a fertilized egg, that sperm must penetrate is known as the __________.
zona pellucida
Do unfertilized eggs have a diploid number of chromosomes along with mitochondria, ribosomes, SEM, RER, and Golgi Bodies?
No! Unfertilized eggs will have the HAPLOID number of chromosomes along with all those mentioned organelles.
After several mitotic divisions, a Zygote that now has 16 to 32 cells in a solid ball will be known as ___________.
a Morula
After several mitotic divisions, a fertilized egg that has developed a fluid filled cavity inside a layer of several cells is __________.
a Blastocyst
Diploid means _________________.
You have ALL the chromosomes needed to be a particular organism.
Which layer of an unfertilized egg will have receptor proteins that a sperm needs to dock with in order to continue into the egg?
the zona pellucida
What is the correct order of embryonic development in a human starting from a fertilized egg?
Fertilized Egg / Zygote / Morula / Blastocyst / Embryo
Once a sperm has fertilized an egg the resulting single cell is called _______.
a Zygote