1 one is correct.....he never think about linkage......later after chromosome mapping it was found that Mendel was lucky that they don't show much linkage !
Explanation:
Taking Xx as heterozygous and XX for normal
Woman =Xx Man =XX
all possible outcomes are XX, XX, XX and Xx
there is 0 probability of having a colorblind child
(But there is a 25 % chance that the child may be a carrier like its mother)
The nucleus is the control center of the cell. A cell's nucleus is able to control the other activities in a cell by expressing certain segments of its DNA, which creates proteins that perform specific activities. ... The cell's DNA is packaged within the nucleus in a structural form called chromatin.
A person with a heart problem needs a pacemaker but is unable to pay for it. The person can approach the various social groups like the non-government organisations to put forward a demand for financial assistance. The non-government organisations have funds that have been collected through various individuals or multinational companies or health organisations that participate in donation programmes. They use these to buy the pacemaker for the needy patient.
Recycling is the best act that us humans can do in order to provide a better environment. With the numerous amounts of garbage that we dispose, we forget to check that some can still be recycled into a different type of product. Recycling can effectively helps us prevent global warming as well.