juniperk's version from 2016-05-05 20:16

Section 1

Question Answer
Fertilizationoccurs when the genetic material of a sperm combines with that of an oocyte to form a zygote
MorulaThree days after fertilization zygote is a solid ball of cells called
Chorionthe outermost membrane surrounding an embryo of a reptile, bird, or mammal
Placentaa flattened circular organ in the uterus of pregnant eutherian mammals, nourishing and maintaining the fetus through the umbilical cord
Gastrulationthe development of the 3 primary germ layers, occurs during week 3
Zygotea diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum.
Blastocyst About day 4 it reaches the uterus. It hollows out, and the center fills with fluid
Amnionfluid-filled sac that surrounds the embryo
Embryoan unborn or unhatched offspring in the process of development.
Implantationthe action of implanting or state of being implanted.
Trophoblasta layer of tissue on the outside of a mammalian blastula, supplying the embryo with nourishment and later forming the major part of the placenta.
Yolk sacserves as an early site for the formation of blood and in time, is incorporated into the primitive gut of the embryo.
Fetusan unborn offspring of a mammal, in particular an unborn human baby more than eight weeks after conception
Autosomesany chromosome that is not a sex chromosome.
Homozygoushaving 2 alleles that control for the same trait
Genotypea person’s genetic makeup
Sex chromosomes2 of a person’s 46 chromosomes that determine genetic sex
Heterozygousa pair of genes where one is dominant and one is recessive
Phenotypethe way the genotype is expressed in the body
Allelesmatched genes, which are at the same locus on homologous chromosomes; one comes from your mother, the other from your father
Dominant allelean allele that suppresses or masks the expression of its partner
Punnett squareused to help figure out, for a single trait, the possible genetic combinations that would result from the mating of parents of a known genotype

Section 2

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