Wednesday, February 24, 2010
WHERE DO YOUR GENES COME FROM?
1. How do we call cells with the two sets of chromosomes?
2. How do we call cells with only one set of chromosomes?
3. Each trait is coded by one gene. How is each version of a gene called?
4. Why is crossing over important? when does crossing over occur?
5. How does the sygote develop into a multicellular organism?
6. what process enables us to receive one version of a gene from each parent?
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1. How do we call cells with the two sets of chromosomes?
ReplyDeleteCells with two sets of chromosomes are called diploids.
2. How do we call cells with only one set of chromosomes?
Cells with only one set of chromosomes are called haploids.
3. Each trait is coded by one gene. How is each version of a gene called?
Each version of a gene is called an allele.
4. Why is crossing over important? when does crossing over occur?
Crossing over is important because it introduces variability. Crossing over occurs during Prophase I of meiosis.
5. How does the zygote develop into a multi-cellular organism?
The zygote develops into a multi-cellular organism by dividing and re-dividing by mitosis.
6. What process enables us to receive one version of a gene from each parent?
The process that enables us to receive one version of a gene from each parent is disjunction during meiosis, because a random pairing of versions of each trait is in each produced gamete (once the chromosomes are separated), and once the gametes come together during fertilization, you get one version from each parent.
1. Dipliods
ReplyDelete2. hapliods
3.
1. We call a cell with two sets of chromosomes a diploid.
ReplyDelete2. a cell with only one set of chromosomes is a haploid.
3. each version of a gene is called an allele, there are two alleles in one gene.
4. Crossing over is important because that depends on what traits we have. it occurse in Meiosis, Prophase 1.
5. The zygote develops into a multi cellular organism by dividing a couple times.