Developmental Biology Lab Exam

• most obvious feature of egg maturation is the...

  deposition of yolk
• it allows the egg to grow in size to support future growth

  accumulation of yolk reserves
• contains vast amount of mRNA, ribosomes, tRNA, and other substances

  egg cytoplasm
• grows rapidly in size during maturation, becomes bloated with nuclear sap

  nucleus
• egg becomes larger, available surface per unit of cytoplasmic volume becomes?

  smaller
• serves as support to the egg to maintain good condition

  membranes
• outermost membrane layer of the egg

  egg shell
• composed of mainly calcium carbonate

  egg shell
• composed of high-energy nutrients such as glycoproteins, carbohydrates and lipids

  egg yolk
• these are broken down during embryogenesis into small molecules to synthesis new molecules


  egg yolk
• this is the yolk mass

  deutoplasm
• appears as circular whitish area lying atop the yolk

  blastodisc
• floats around the most dorsal position

  blastodisc
• second innermost membrane layer of the egg

  egg white
• consist of 85% water and a mixture of albumin and other proteins

  egg white
• inner heavier layer of albumin around the yolk

  chalaza
• appears twisted into rope-liked strands

  chalaza
• noncellular innermost membrane that encloses the egg cell

  vitelline membrane
• this membrane develops in the ovary between the oocyte and the follicle cells

  vitelline membrane
• located right after the egg white, made of keratin fibers matted together

  shell membranes
• their connection covers all areas except at the blunt part where they are separated

  shell membranes
• it adheres to the egg white

  inner shell membrane
• it adheres to the egg shell leaving a space in between are spaces

  outer shell membrane
• this is at the broad end of the hard boiled egg, vertically positioned at the marked area of the blastodisc exposing the neck of the latebra

  airspace
• a flask-shaped area where the principal accumulation of white yolk lies

  latebra
• part of the latebra that extends toward the blastoderm

  nucleus of pander
• formed at the area that separates the yellow and white yolk

  concentric rings
• sexual union to facilitate fertilization

  mating or copulation
• a process that provides recombination of maternal and paternal genes, and activates the egg to begin development

  mating or copulation
• the fertilization of organism is completed in the environment

  external fertilization
• fertilization of fish and amphibians

  external fertilization
• fertilization happens inside the body

  internal fertilization
• fertilization of mammals

  internal fertilization
• any sound produced by male or female before, during or after mating

  sound produced
• any peculiar movement manifested by either male or female animals as gesture for mating

  body movements
• length of time of mating

  duration of copulation
• it is either internal or external

  type of fertilization
• mature male mice are capable of copulation?

  true
• the female receives the male only during a period known as

  estrus
• are polyestrous - have a reoccurrence of estrus during the breeding season

  female mice