Term
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Definition
| The process of forming male gametes through meiosis is ______ |
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Term
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Definition
| The process of forming male gametes through meiosis is ______ |
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Definition
| The process of forming male gametes through meiosis is ______ |
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Definition
| The process of forming females gametes through meiosis is ______ |
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Definition
| The visualization of the chromosomes is the _____ |
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Term
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Definition
| Somatic cells have a diploid number of ___chromosomes and gametes have a haploid number of ___chromosomes |
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Term
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Definition
| Each of the two copies of each type of chromosome is diploid cells is called a _____ chromosome with one being from the mother and one being from the father |
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Definition
| The different regions on a chromosome coding for different traits is a ____ |
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Definition
| _____is a reduction cell division wiht the chromosome number being halved from a diploid number to a ____number |
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Definition
| Genetic variability of the gametes is increased by crossing over of portions of homoglous chromosomes which occurs during ____ |
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Definition
| The homogolous chromsome line up in pairs along the midline of the cell during ____ |
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Definition
| The homologous chromosomes separate opposite ends of teh cell during _____ |
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Definition
| Males are capable of sexual reproduction through their entire lifespan because the ___can reproduce themselves by mitosis |
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Term
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Definition
| Once a spermatogenic cell is differentiates into a ______,it must undergo meiosis |
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Term
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Definition
| The first meiotic division forms cells called _____which have 23 double chromosomes |
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Definition
| The second meiotic division forms cells called ____which have 23 single chromosomes |
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Term
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Definition
| The process of ____forms sperm cells through differentiation |
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Term
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Definition
| Females are incapable of sexual reproduction through their entire lifespan because of all the ____have differentiated into _____which are arrested in meiosis |
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Term
| primary oocytes, secondary oocytes |
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Definition
| Approximately once a month, a groupd of ____ are stimualted into further stages of meiosis and try to develop into _____ |
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Term
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Definition
| Generally, only one _____is ovulated each month |
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Term
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Definition
| The second meiotic division will not occur unless the ovulated gamete is activated by a sperm cell during ____ |
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Definition
| The ovum is a transitory phase and the male pronucleus combines with the female pronuleus to form the ____ |
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Term
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Definition
| ____is the term for activationg a sperm cell and making it capable of fertilizing an egg |
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Term
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Definition
| The ___is a transparent layer of glycoprotien extracellular matrix surrounding the egg cell |
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Term
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Definition
| The ___ enzymes of the sperm cell are required to digest a pathway through the glycprotein extracellular matrix |
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Term
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Definition
| Fertilzation of the egg by multiple sperm cells is prevented by the ____mechanism involving a change in the membrane potential and the ____ mechanism involving a cortical reaction to harden and left off the glycoprotein layer |
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Term
| zygote,pronucleus,pronucleus |
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Definition
| The new individual called a ___occurs when the male ___and female ____join together |
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Term
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Definition
| ____twins occur when a groupd of genetically identical cells completely split into two |
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Term
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Definition
| ___twins occur when a group of genetically identical cells do not completely split apart and are still partially connected |
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Term
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Definition
| ____twins occur when 2 separate egg cells are ovulated and each cell is fertilized by a different sperm cell |
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Definition
| The large solid ball of cells called a ___results from rapid cell division without growth occuring between each cell divisions |
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Definition
| Differentiation of the solid ball of cells into a hollow ball called a ___is a criticalstage in forming an embryo |
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Term
| inner cell mass, trophoblast cells |
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Definition
| The ____of the hollow ball will continue to develop into the embryo and the _____will eventually form the placenta with maternal tissue |
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Term
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Definition
| ____occurs when the embryo implants into the endometrial lining |
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Definition
| The ____is an extraembryonic membrane that forms a fluid filled cavity surrounding the embryo to protect it from physical trauma |
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Definition
| The ____is a extraembryonic membrane that forms the initial blood cells of the embryo |
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Definition
| The ____is an extraembryonic membrance that extends villi to form the fetal component of the placenta |
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Definition
| The ___is an extraembroinc membrance that forms the structual basis if the umbilical cord |
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Definition
| During the process called ____,the embryonic disk is transformed into a 3 layered embryo |
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Term
| ectoderm,mesoderm,enoderm |
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Definition
| The three primary germ layers are the ____,_____,and _____ |
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Term
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Definition
| The ____not only provides nutrients and oxygen and teh developing fetus, it also serves as the source of female sex steriods for teh second and third trimester |
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Definition
| The umbilical ___brings oxygen and nutrient rich blood to the fetus and the umbilical ___returns carbon dioxide and metabolic wastes to the mother |
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Definition
| The ____is a fetal blood vessel that shunts blood from the pulmonary trunk into the inferior vena cava |
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Definition
| The ____is a fetal blood vessel that shunts blood from the pulmonary trunk into the arotra |
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Definition
| The ___is a fetal opening in the heart to shunt blood from the right atrium into the left atrium |
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Definition
| Interesting milestones in fetal development include the completion of ___by the end of the second week |
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Definition
| The extra embryonic membranes ____ and ____ are present by the end of the third week |
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Definition
| Formation of the ____begins by the forth week but will not be fully fuctional until the ninth month |
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Term
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Definition
| All the organ systems are present by the end of the eigth week and the embryo then transitions to ____development |
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Definition
| During the first trimester, the corpus luteum is maintained by the hormone ____ |
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Definition
| A fully functional placenta also serves as an endocrine gland, secreting the sex steriods ____,______ |
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Definition
| The substance ____actually causes uterine muslce to contract |
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Definition
| The posterior pituitary gland secretes the hormone ____in a positive feedback mechanism to enhance uterine contraction |
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Definition
| The myometrium consists of ___muscle |
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Definition
| A ____is performed to prevent tearing of the perineum during delievery |
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Definition
| The production of milk in the new mother is called _____ |
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Definition
| Nursing the newborn with breast milk requires the hormone ____which stimulates the mammary glands to produce milk and ___which causes milk to be expressed |
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