Heredity B/Designer Genes C Question Marathon

[hmath729]

Correct, your turn. Just remember that the format for hiding is

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[hide]Stuff outside|Stuff inside[/hide]

[PicturePerfect]

Would the first part be.. (Click to Show Hidden Text)

47, XY, +21

[hmath729]

Yep.

[emescferrall]

Okay. Here goes: A male with blood type A marries a woman with blood type AB. They have four children. List the genotypes and phenotypes of these four children.

[vennowsah]

Is this correct? (Click to Show Hidden Text)

Since the genotype of the male isn't specified, he can have two possible genotypes.
If the male has a genotype of AA, then the four children would be:
Genotype- 2:2 (50% AA, 50% AB)
Phenotype- 2:2 (50% type A, 50% type AB)

If the male has a genotype of AO, then the four children would be:
Genotype- 1:1:1:1 (25% AA, 25% AO, 25% AB, 25% BO)
Phenotype: 2:1:1 (50% type A, 25% type AB, 25% type B)

[SWAnG]

Is this a trick question? Technically it could be any of four genotypes, and any of four phenotypes. But it is all perchance. We don't know for sure what the genotypes and phenotypes are of the children.

[ageek]

Well, not exactly. (Click to Show Hidden Text)

There could be any of 4 different genotypes, and 3 different phenotypes. It's fairly evident that vennowsah is correct, so I believe he can ask a question anytime unless the person who asked the question comes on. But we don't need to debate small technicalities.

[vennowsah]

Alright, here are my questions:

1) Three models of DNA replication were proposed after the discovery of the Double Helix by Watson and Crick. What were the three models? Which of these models proved to be the way in which DNA replicates? Explain this type of replication.
2) What is the difference between introns and exons?

[SWAnG]

1)Conservative, Dispersive, semi-conservative. Semi-conservative, where replication results in one original strand, and one new strand.
2) introns are not expressed, exons are expressed in DNA after splicing

[emescferrall]

This is late, but vennowsah, yes, you are correct. I was looking for your second answer more than the first! Parents: AO AND AB. Kids: AA, AO, AB, and BO.