A, DNA fragments containing repeats are labeled with radioactive probes.
Answer:
50 %
Explanation:
A woman has fixed number of eggs. With each menstrual cycle, one egg is released. By the time a woman reaches the age of early 40s, the egg count has reduced tremendously and the chances of a woman being fertile are very low.
Along with women, men also develop some issues with their sperm count and speed.
Thus the probability of a man and woman having baby is 50% at the age of 40.
Gene expression is about making mRNA which is then translated into a protein. If the mRNA that was expressed is mis-read it may or may not have an affect on gene expression. It will have a negative effect if:
1. The protein produced is required for gene expression (e.g. the DNA polymerase)
2. The protein produced is another critical protein that the cell cannot live without.
3. If the question is more about constantly misreading during translation, eventually the cell would die because the wrong proteins would be made (or not made at all).
