Question

Topic 2: Inheritance
There is a gene in Tribolium confusum flour beetle) which controls body colour.
A represents the dominant allele for red-brown body colour
a represents the recessive allele for black body colour.
Complete the genetic diagram below to show the colour of beetles produced when a
heterozygous beetle is crossed with a beetle that is homozygous recessive for this gene.

Parental phenotype


Parental genotype
x
Offspring genotypes
Ratio of phenotypes​

Answer 1

Inheritance Hierarchies (Trees)

The "List<-OrderedList" hierarchy¤ is the smallest possible example of inheritance.

 

Inheritance hierarchies between classes¤ can be much more elaborate trees:

 

Multiple Inheritance¤

Things can be classified (abstracted) in many different ways, simultaneously

 

Hence it is possible for a particular class¤ to inherit from two or more parent classes¤¤ simultaneously:

 

Inheritance Graphs

In the larger scheme of things, multiple inheritance¤ produces inheritance graphs (rather than trees):

 

Inheritance is Transitive

The additional properties conferred by inheritance as passed on to classes¤ which subsequently inherit

 

Hence we could simplify the previous inheritance graph: