Please help with these questions Do not write on this exam You and your spouse a

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Please help with these questions

Do not write on this exam You and your spouse are expecting your first child. Because you and your spouse have an extenst history of genetic diseases on both sides of the family, you are concerned about the health of your t that an amniocentesis be performed so that you can prepare yourseto e sack in order to collect a sample of amniotic fluid containing sloughed cells from th unborn baby and request amniocentesis mother š belly and ahead During this procedure, a large needle is inserted through the mothers belr embryo. These cells chromosomes are then grown in a laboratory for about a week in order to analyze the 4s doctors are analyzing the embryonic cells, they find the cell nucleus pictured above. It is certainly not a human cell. There must be some contamination in our sample (the lab they use processes DNA samples for a variety of researchers using a multitude of different organisms). The table below lists several possible contaminant organisms and their diploid chromosome number Organism iploid Chromosome Number rabidopsis (a small flowering plant) 10 orn Hvena Mosquito ack jumper ant urkey 82 least Page 2 of 16

Explanation / Answer

(1)D.human cells have a pair of chromosomes that ae grossly different in size representing the sex chromosomes.

(2)E.yeast is most likely to cause contamination.

(3)A.61 because one gamete from turkey will contain 41 chromosomes and one gamete from hyena will contain 20,so in total 61 will be there.

(4)b.10 because mitosis is equational division.

(5).b CCAAAGAAGTTCTCT

(6)a.C-G

C-G

A-U

(7)b.unwinding and unzipping of the specific molecule of DNA,matching of nitrogenous bases with complementary RNA,release of RNA molecule,coming back together and coiling of DNA.

8.c. it is always expressed when in homozygous state.

9.e. 0:2:2

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