Glencoe Bio Homework 10.2

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  • Topic: Chromosome, Meiosis, Gamete
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  • Published : February 10, 2013
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Biology homework 10.2

1. How are the cells at the end of meiosis different from the cells at the beginning of meiosis? Use the terms chromosome number, haploid, and diploid in your answer. A: Cells in the begining of meiosis has diploid cells, with a full amount of chromosomes. In the end of meisos, the four genetically different daughter cells are haploid (gametes), they have half the number of chromosomes. Because of this, they are able to fuse with other gametes (ex. egg and sperm) to form a zygote, which is a diploid cell with the full number of chromosomes.

2. What is the dignificance meiosis to sexual reproduction?
A: The genetic diversity brought about by meiosis and sexual reproduction is responsible, to a significant extent, for the great diversity of life-forms seen in the living world today. Evolution is spurred on by differences among offspring and meiosis and sexual reproduction ensure such differences.

3. Why are there so many varied phenotypes within a species such as human? A: The phenotypes are affected by your enzymes since all metabolic activities of our bodies are down to enzymes.. Your Enzymes are proteins. They have been made from translation after transcription. Thus Your DNA got transcribed to make the enzymes.

4. If the diploid number of plant is 10, how many chromosomes would you expect to find in its triploid offspring? A: If the diploid number of the plant is ten, then its haploid number is 5. Since triploid refers to three times the haploid number, then a triploid plant would have 15 chromosomes.

5. How do the events that take place during meiosis explain Mendal’s law of independent assortment? A: The segregation of chromosomes in anaphase I of meiosis explains Mendel's observation that each parent gives one allele for each trait at random to each offspring, regardless of whether the allele is expressed. The segregation of chromosomes at random during anaphase I explains Mendel's observation that factors, or genes,...
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