Molecular genetics questions.

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    • December 5, 2004 at 8:18 pm #219
      strawberrykiwi
      Participant

      💡 If anyone can help me with ANY of these 5 questions, it would be greatly appreciated!!!

      ❓
      1) what is the connection between a chromatid and a replicated DNA molecule?
      2)How can all organisms share the same 4 bases DNA and still be so diverse?
      3)If a fly has a diploid number of 12, how many chromosomes would there be in each cell at the end of telophase of mitosis?
      4) what is the pairing rule for deoxyribonucleic acid?
      5) How many chromosomes would normally be found in a human stomach cell?
      ❓

      ➡ once again if you know the answer to ANY of these plz post!
      thanks =)

    • December 5, 2004 at 10:43 pm #18699
      biostudent84
      Participant

      1. A chromatid is a half of a replicated chromosome (the chromosome is made up of DNA)
      2. Bases are read in sets of three, called codons. There are 64 possible codons, which is more than enough to code for the 20 amino acids as well as the Start and Stop commands.
      3. 24. Each is replicated, but the cell is not completely divided.
      4. A<->T and G<–>C
      5. 44 normal, plus 2 sex chromosomes…46 alltogether

      Kyle

    • December 6, 2004 at 1:57 am #18702
      strawberrykiwi
      Participant

      oh my gosh thanks SOOOOOO much biostudent, you rock!!! i actually understand this stuff now so hopefully i’ll do OK on the test tuesday. thanks again!

    • December 6, 2004 at 3:15 am #18703
      biostudent84
      Participant

      lol, all right thanks =) if you need any more help, we’ll be here.

    • December 6, 2004 at 10:53 pm #18707
      strawberrykiwi
      Participant

      awesome!! this is the coolest place ever, i’ll come back if i have more questions =D
      thanks!

    • December 7, 2004 at 11:32 pm #18714
      biostudent84
      Participant

      Lol, please do

    • December 26, 2004 at 1:45 pm #18923
      brownpanda
      Participant

      I believe there are 46 chromosomes everywhere in the human body…. 😉

    • December 26, 2004 at 6:18 pm #18926
      biostudent84
      Participant

      I didn’t believe I said anything contrary to that =P

    • December 26, 2004 at 10:11 pm #18928
      junkyarddawg
      Participant

      Or as “old folks” like me say 23 pairs. This forum sure would have helped me with my genetics class!!!

    • December 27, 2004 at 1:37 am #18932
      biostudent84
      Participant

      It is generally still said “23 pairs,” but they have become interchangable.

      Down’s Syndrome is still said to affect Chromosome Pair #21, not Chromosomes 42 and 43…

    • December 28, 2004 at 1:52 pm #18947
      brownpanda
      Participant
      quote :

      I didn’t believe I said anything contrary to that =P

      You didn’t. strawberrykiwi seemed to suggest that by asking

      quote :

      How many chromosomes would normally be found in a human stomach cell?

      Just trying to help clarify things, if she’s still around.

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