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Each skin cell in a mouse has 40 chromosomes. How many chromosomes were present in each cell after dividing four times during cell culture?

When a cell divides, the number of chromosomes in that cell does not change. So if a cell had 40 chromosomes in it before it divided, it would still have 40 chromosomes in it after it had divided.
KJ
Answered by Kelly J. • Biology tutor
14200 Views

What are indicator species and what are they used for?

Indicator species are organisms whos presence or absense may indicate something about the environement. For example, an increase in organisms that are not dependant on oxygen to survive (also known as anaero...
KJ
Answered by Kelly J. • Biology tutor
5061 Views

How do I answer a compare question?

Command words are important and you should check carefully exactly what the question is actually asking for. If a question asks you to 'compare', all you need to do is point out similarities and differences,...
DH
Answered by Daniel H. • Biology tutor
48823 Views

How do bacteria become resistant to antibiotics?

That’s a really good question. Well are you familiar with the concept of Natural Selection? (assume correct explanation from the student). Yes, you’re right. It is in fact by this same mechanism that bacteri...
HC
Answered by Harry C. • Biology tutor
3706 Views

How does the electrical system of the heart work?

The electrical activity of the heart begins in the sinoatrial node which is a collection of pacemaker cells located in the right atrium. These cells spread electrical activity across the atrium causing both ...
EM
Answered by Emma M. • Biology tutor
3556 Views