When a certain gene product is needed, DNA is _______1______ into _____2______.

Question

When a certain gene product is needed, DNA is _______1______ into _____2______. This molecule then leaves the nucleus and goes to the ribosomes. The ribosome contains ______3______ and is the place in which ____2_____ meets the _____4_____ that is connect to one amino acid each. There the sequence of the _____2____ is _______5______ into a certain amino acid sequence. Three DNA bases form one ______6_____ and one _____6______ corresponds to one amino acid. When more skin cells are needed, the skin cells go through ________7______. DNA needs to be ____8____ before the cells can divide. This happens during the ______9_______ of the cell cycle. This is followed by the prophase, metaphase and anaphase. In the following _____10____ the _____   _______ (11) arrived at the opposite poles and are packaged into new nuclei. During Meiosis ______ ______ (12) divide to produce ________13____. _____13_____ have _____14_____ the number of chromosomes. Evolution and thus survival of the fittest is possible due to the fact that meiosis produces genetic variation in the offspring. There are three sexual sources of genetic variation: 1. Independent _______15______ during ______16______ I , 2. Crossing over during prophase I (which happens to non sister chromatids when they form a ______17_____ . 3. Random fertilization.

FILL IN THE BLANKS

Word bank: anaphase, assortment, chiasmata, codon, double, gametes, half, interphase, meiosis, metaphase, mitosis, mRNA, replicated, rRNA, sex cells, sister chromatids, telophase, transcribed, translated, tRNA

Explanation / Answer

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