Genetic inheritance

Question 1

What are Mendel’s three laws?

Answer 1

• The law of segregation.
• Law of independent assortment.
• Law of dominance.

Question 2

What is the Law of segregation?

Answer 2

‘During the formation of gametes, chromosome pairs are separated’.

Question 3

What is the Law of independent assortment?

Answer 3

‘Alleles on pairs of chromosomes are allocated to gametes randomly’.

Question 4

What is the Law of dominance?

Answer 4

‘Some Alleles are dominant to others. In any organism, dominant alleles will be expressed over recessive alleles as the phenotype depends on the presence of dominants alleles’.

Question 5

What is monohybrid inheritance?

Answer 5

When the inheritance of characteristics are controlled by a single gene, this can be determined by using a Punnett square.

Question 6

What are Dihybrid crosses?

Answer 6

Dihybrid crosses determines the possible genotypic and phenotypic combinations of offspring for two particular genes that are unlinked.

Question 7

In a Punnett square does f1 and f2 stand for?

Answer 7

• f1, the first generation, obtained by crossing two different parents.
• f2, the second generation, obtained by crossing two f1 parents.