Crossing-over results in what observable change in our cells? i

The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?