My first question ..........
.............ther as identical twins.
>> you have to take into consideration of that fact that the DNAs in the homologus chromosomes are crossing over during metaphase1(not sure about the exact pahse, but i think this is the one), which creats a HUGE variation in the two replicated chromosomes. This happens everytime a egg or sperm is formed, so, it's not that the chromosomes are pulled apart and create two sets of chromosomes that are same everytime, they are VERY different, :. its hard for two childern borm from the same parents at two different times be identical twins.
Am I right here......
......... homozygot blue eyed.
>> a homozygous dominant parent and a homozygous recessive parent will never create a offspring with a recessive phenotype(blue eye).
Code:
B - Dominant. for eye color(brown)
b - Recessive. for eye color(blue)
Parents : BB , bb
GAMETES: Parent1: B B | Parent2: b b
B | B
------------
b| Bb | Bb |
b| Bb | Bb |
------------
NO bb, therefor all heterozygous dominent for eyecolor(brown)
Sometimes something goes wrong when a sperm cell ..........
............could survive?
>> There will be problems when down syndrom occurs and when the baby is born(sometimes the fetus do survive) with an extra set of chromosomes, s/he will show some abnormality in their phenotype structure(EG: characteristic faces, tongues eyelids and would be developmntally chalaged physically and mentally) But your idea about having the blue eye is very interesting and i do see some possibilities of it having some truth.... thigns like that are possible(when the dominent gene is missing, the recessive takes over IE. sexlinked color blindness)
i would've probably been able to tell u somethings more if i lisened in my bio class, but, since i dodn't i guess that's all from me..