Science 9
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| differentiation | In humans, the process in which cell layers will eventually form the organs and tissues of a baby
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| diploid number | two sets of chromosomes (2n); the diploid number for a human cell is 46 (2 x 23) (6.1)
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| embryo | the stage of a multicellular organism that developed from a zygote
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| embryonic development | early development of a multicellular organism following fertilization
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| external fertilization | fertilization in which a sperm cell and an egg cell unite outside the boodies of the parents
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| fertilization | the process during which an egg cell is penetrated by a sperm cell and the hyploid genetic information of both male and female gametes combines
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| gametes | specialized cells necessary for reproduction; in animals, male gametes are called sperm cells and female gametes are called egg cells
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| genetic diversity | inherited genetic differences in a species that give many organisms a survival advantage
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| haploid number | each set of inherited chromosomes, half the diploid number(n); humans inherit one set of 23 chromosomes from their female parent and one set of 23 chromosomes from their male parent
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| homologous chromosomes | a pair of matching chromosomes
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| internal fertilization | fertilization in which sperm cells are deposited inside the female's body where they meet egg cells
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| mating | the process by which gametes arrive in the same place at the same time
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| meiosis | the process that produces gametes with half the number of chromosomes as body cells
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| sexual reproduction | reproduction that requires two parents and produces offspring that are genetically different from each other, from either parent, and from any other member of their species
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| zygote | the new diploid (Zn) cell formed by the process of fertilization, which receives half its chromosomes from its female parent and half from its male parent
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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