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What is meant by the term genotype and how does this differ from the phenotype?

The genotype of an organism is the combination of alleles, different copies of a gene at the same locus, (from the mother and father) that give rise to a particular trait whereas the phenotype is the observa...
LS
Answered by Lucy S. • Biology tutor
3892 Views

How do vaccines prevent certain diseases?

Vaccines introduce a dead, inactive or altered form of a pathogen (a microbe that causes an infectious disease) into the body. These pathogens have antigens, which have a shape specific to that pathogen. The...
AM
Answered by Alice M. • Biology tutor
3042 Views

What’s the difference between mitosis and meiosis?

Mitosis is a type of cell division in which a cell divides to form two cells that are genetically identical to the original cell and each other. During the cell cycle, the cell’s amount of genetic material i...
RD
Answered by Rebecca D. • Biology tutor
3817 Views

A student wants to study red blood cells beneath a microscope. She is not sure which solution she should use to observe such cells. In solution A, she sees figure A (plasmolysis) and in solution B she sees nothing. Can you explain her observations?

Solution A - plasmolysis. The red blood cells were in an hypertonic solution (solution had a lower water potential than the red blood cells due to increased concentration of solute) thus water molecules move...
RF
Answered by Roxy F. • Biology tutor
3427 Views

Describe how selective breeding could be used to improve the volume of milk produced by cows.

Calculating the milk yield of mother cows and their offspring can indicate which animals have good breeding genetics. Bulls also play an important role in generating a good milk yield, and their offsprings m...
SM
Answered by Saffron M. • Biology tutor
12212 Views