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I'm Lichen Bio Sexua
I'm Lichen Bio Sexual Repro 2011
| Question | Answer |
|---|---|
| what condition is needed for external fertilization | moist environment |
| separation of homologous pairs of chromosomes during gametogenesis is known as | disjunction |
| why is the earthworm classified as a hermaphrodite | produces both eggs and sperm |
| the embryo of an animal with internal development develops where | in the uterus |
| type of fert and dev of most birds and reptiles | internal fert, external dev |
| organs in which male and female sex cells develop | gonads |
| term for zygote dividing by mitosis | cleavage |
| process that forms eggs and sperm | meiosis, aka gametogenesis |
| name an advantage of internal fert and dev over external | chance for zygote survival is increased |
| name for the embryo when it forms an indented shape | gastrula |
| correct sequence of events for formation and development of an embryo | meiosis, fertilization, cleavage, differentiation |
| process that forms polar bodies | oogenesis |
| what occurs at the placenta | materials are exchanged between fetal and maternal blood |
| what process produces offspring with characteristics different from those of their parents | meiosis (sexual repro) |
| compare sperm and egg cells | both formed by meiosis, both contain monoploid number of chromosomes, necessary for sexual repro |
| contrast sperm and egg cells | different sizes, different amounts of cytoplasm, sperm are motile |
| if a body cell contains 20 chromosomes, how many would a gamete of that species contain | 10 |
| reproductive adaptation found in most terrestrial vertebrates | fusion of gametes within female reproductive tract |
| difference btwn placental and marsupial mammals | marsupial embryo is born at immature stage of development and finishes dev in pouch |
| type of fert and dev in a species that produces very few eggs | internal fert and internal dev |
| hollow ball of embryo cells | blastula |
| how do we get different cells, such as skin, muscle and nerve, when the cells all originate from the same fertilized egg and contain the same genetic information? | different genes are turned on, causing different SOB, causing different SOAA, causing diff proteins, which causes diff cell types |
| what does meiosis do to homologous pairs of chromosomes | separates them into different gametes. Each gamete receives one of the pair, not both. |
| Give 3 differences btwn meiosis and mitosis. | see Cell Division study card! |
Created by:
thomasel
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