2007-01-30 10:30:47 · 4 answers · asked by chanel_addiction 1 in Science & Mathematics ➔ Biology
do you mean crossing over
all homologous chromosomes trade with each other
2007-01-30 10:39:41 · answer #1 · answered by wesnaw1 5 · 0⤊ 0⤋
all the chromosomes are capable of trading genes. they must be of the same pair i.e chromosome 21 from the male with chromosome 21 from the female. The trading of gene occurs when they are aligned and then they begin to crossover whereby some the genes from both chrmosomes move over to the new chrmomsome. This process is called a cross over. Genes that are closer together along a chrmomsome have less chance of crossing over than those further apart. this is known as crossover frequency. hope this helps. this is what I can remember from the top of my head. its been a while
2007-01-30 18:39:43 · answer #2 · answered by singing_saagar 2 · 0⤊ 1⤋
46 chromosomes trade genes
so they match up in pairs 23 from the mom and 23 from the dad
when they exchange DNA with eachother it's called crossing over and the pairs of chromosomes are called homologous pairs.
2007-01-30 20:53:24 · answer #3 · answered by nilo 3 · 0⤊ 0⤋
What these two answers failed to inform you about is the poor crossing over record of the Y chromosome. It only crosses over with the X chromosome on the tips. The Y chromosome is piling up a serious load of deleterious mutation and has only an estimated 250,000 years to be around.
2007-01-30 20:15:23 · answer #4 · answered by Anonymous · 0⤊ 0⤋