lecture 2

Question 1

what are genes

Answer 1

Units of hereditary, that contain information that determine specific traits.

Question 2

why do genes exist as pairs in humans

Answer 2

because human cells are diploid. One chromosome is maternal the other paternal in origin.

Question 3

how is the inheritance patttern of alleles controlled?

Answer 3

controlled by the process of cell division called meiosis

Question 4

describe the gametes formed in meiosis

Answer 4

each gamete formed contains only one of each chromosome pair and therefore contains only one of each type of allele ie alleles segregate equally during meiosis.

Question 5

what do mendles experiment explain

Answer 5

, one allele type was expressed preferentially compared to the other in the penotype

Question 6

Summary - The inheritance of single genetic traits

Answer 6

Genes exist in pairs, with each pair containing different types called alleles.

Allele pairs separate during gamete formation in meiosis and are inherited randomly.

Alleles can be dominant or recessive based on their phenotypic expression.

Dominant alleles are more evident in the phenotype compared to recessive alleles.

Many human disease alleles are recessive, requiring both alleles to be recessive for expression.