Inheritance

Question 1

What is inheritance?

Answer 1

Inheritance is the passing of genes from parents to their
offspring (children).Genetic characteristics (qualities) are passed on at the
time of conception  ½ ♂& ½♀

Question 2

What is a genotype?

Answer 2

The genetic make-up of an individual is its genotype.

Question 3

What is a phenotype?

Answer 3

The phenotype of an individual is the physical expression of the genotype within the environment.

Question 4

What are alleles?

Answer 4

Different versions of
the same gene.

Question 5

Homozygous

Answer 5

2 of the same
genes, e.g. bb or BB

Question 6

Heterozygous

Answer 6

2 different
genes, e.g. Bb

Heterozygous individuals are
called carriers.

Question 7

Complete dominance

Answer 7

A trait can be either
dominant or recessive.

Question 8

Dominant trait

Answer 8

Dominant traits will always be expressed.
Always denoted with a capital letter B, Y
e.g. BB & Bb will both express brown eyes.

Question 9

Recessive trait

Answer 9

Recessive traits will only be expressed if there are 2
(homozygous).
Always denoted with a lower-case letter
b, y
e.g. bb will express blue eyes

Question 10

What are punnet squares used for?

Answer 10

Used to predict possible outcomes of a genetic cross.

Question 11

Co-dominance

Answer 11

When two alleles are expressed at the same time they are co-dominant.

The ABO blood typing system are
examples of co-dominance.

Alleles are assigned with two different capital letters superscripted to one
common letter.