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Bio 2010 WB Topic 4
The Living Environment (Topic 4)
| Question | Answer |
|---|---|
| asexual reproduction | a method of reproduction in which all the genes passed on to the offspring come from a single individual or parent |
| cloning | a technique used to make identical organisms |
| development | the changes that occur from the fertilized egg to a complete individual; occurs by mitosis and differentiation of cells |
| differentiation | the process that transforms developing cells into specialized cells with different structures and functions |
| egg | a sex cell produced by a female |
| embryo | an organism in the early stages of development (prior to birth) |
| estrogen | a hormone (produced by the ovaries) that controls female sexual development and the reproductive process |
| expressed | the way that an unseen gene is seen in an organism as an actual physical trait |
| fertilization | the process that combines a sperm cell and an egg cell |
| fetus | the unborn, developing young of an animal during the later stages of development |
| gamete | an egg or sperm cell; a sex cell |
| gene epression | the result of activated genes |
| meiosis | the process that results in the production of sex cells (sperm and egg) |
| mitosis | the process that divides the cell's nucleus into two, each with a complete set of genetic material from the parent cell |
| ovaries | the organ of the human female reproductive system that produces an egg cell, the female gamete |
| placenta | the organ that enables nutrients and oxygen to pass from the mother's blood to the fetus, and waste products to pass from the fetus to the mother's blood |
| progesterone | a hormone associated with sexual development and the reproductive system |
| recombination | the additional mixing of genetic material from a sperm and egg which results in a unique combination of genes |
| sex cell | an egg (female) or a sperm (male) |
| sexual reproduction | a method of reproduction that involves two parents to produce offspring that are genetically different from either parent |
| species | a group of organisms that share certain characteristics and can mate with one another, producing fertile offspring |
| sperm | the male sex cell |
| testes | the male reproductive organ that produces sperm and the hormone testosterone |
| testosterone | a hormone associated with male sexual development and reproduction |
| uterus | the organ, in female animals, where the embryo develops into a fetus |
| zygote | the cell that results from the joining of the egg and sperm |
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TJF014
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