Science
Heredity and Evolution
Practice questions
Having half the chromosome number in reproductive cells prevents which major problem?Which combination is necessary for the birth of a male child in humans?Which chromosome combination forms a female child in humans?Why is it scientifically wrong to blame only the mother for the sex of a child?Why does cutting the tail of a mouse not make its offspring tailless?If a change is present in body cells but not in reproductive cells, why will it not pass to the next generation?What is the importance of greater variation in sexual reproduction for evolution?What risk can a population face in a changing environment when asexual reproduction produces low variation?Natural selection acts on already existing variations. What does this correctly mean?In which situation will natural selection be seen most clearly?If a useful trait is not inherited why will it not change the evolution of a population?What is the most basic difference between genetic drift and natural selection?If a trait becomes more common in a small isolated population without special advantage what can it be an example of?When a new population starts from a few organisms and their traits become common in the whole population this can be linked to what?How does geographical isolation increase the possibility of forming a new species?Two groups look very similar but cannot produce successful offspring with each other. What is this a strong sign of?Why may isolation alone not be enough for speciation?How does the order of fossil layers help in understanding evolution?Fossils are evidence of evolution but why do they not give complete information alone?Why do homologous organs indicate common ancestry?