2007-09-12 15:41:32 · 5 answers · asked by Stuff 3 in Science & Mathematics ➔ Biology
When dominant traits take over recessive traits.
2007-09-12 15:49:19 · answer #1 · answered by Stephanie S 4 · 2⤊ 0⤋
Two ways; luck and recessive.
When the chromosomes combine it is a matter of luck what traits are taken and what are not. We have enough redundancy so that it will usually work out right, but you are never sure exactly what you are going to get unless you create a clone.
Some genes, like the one that causes hemophilia, are recessive. They need both parents to contribute a recessive gene for the gene to show up. Otherwise it won't, but the recessive genetic factor will still be in the genes ready to cause a potential problem.
2007-09-12 15:50:59 · answer #2 · answered by Dan S 7 · 1⤊ 0⤋
it's a matter of dominance and recessiveness of a given trait...If a parent displays a certain recessive trait while the other parent displays a dominant trait, there is a 50-100% chance that their offspring will have the dominant trait..
there are also sex-linked traits...x-linked traits carried by the mother has a 100% chance to be passed to her son if the mother displays the trait, while 50-100% if she doesn't...daughters only have 50% chance...
2007-09-12 22:35:49 · answer #3 · answered by midnight 1 · 1⤊ 0⤋
becouse of the level of penetration that may varies
2007-09-12 17:34:52 · answer #4 · answered by refuzie 2 · 0⤊ 0⤋
I have the same BCR for Biology Final Exam ...............
2016-04-04 18:06:56 · answer #5 · answered by ? 4 · 0⤊ 0⤋