17. Inherited Change

Question 1

Define genotype

Answer 1

The genetic constitution of an organism

Question 2

Define phenotype

Answer 2

The expression an organisms genetic constitution and its interaction with the environment.

Question 3

Define gene

Answer 3

A length of DNA which position on a DNA molecule is called a locus.

Question 4

Define allele

Answer 4

A different form of the same gene

Question 5

What is the ratio of genotypes of a heterozygous monohybrid cross

Answer 5

3:1

Question 6

What is the ratio of genotypes of a heterozygous dihybrid cross

Answer 6

9:3:3:1

Question 7

State Mendel’s law of independent assortment

Answer 7

Each member of a pair of alleles may combine randomly with either of another pair

Question 8

Define codominance

Answer 8

When both alleles are dominants meaning in a heterozygous organism both alleles are expressed in the phenotype

Question 9

Give an example of multiple alleles

Answer 9

Blood type- IA IB and IO

Question 10

What type of linkage is it if the allele is found on the X or the Y chromosome

Answer 10

Sex linkage

Question 11

What is autosomal linkage

Answer 11

Where two or more genes are carries on the same autosome (chromosomes)