Sexual Vs Asexual Reproduction

Purpose of Reproduction

žTo make sure a species can continue.

Asexual Reproduction

• žproduced from one organism.

• žOffspring are identical to the parent/ each
  other

• common in plants

Types of Asexual Reproduction

ž 1.Vegetative Propagation

ž 2. Binary fission

ž 3. Budding

ž 4. Regeneration

žVegetative Propagation - new plants grow from
the parent plant

ž

žBudding -the offspring develops from a bud on the parent & detaches when it is mature.

​Hydra

žFragmentation: a piece of the body of the parent breaks off & forms into an offspring.

Binary Fission

ža single cell divides to form two new cells
ž

Advantages

of Asexual Reproduction

žFaster and Easier – no partner needed

žDoesn’t have to travel, so it conserves energy

žLess chance of mutation – less steps to follow,
so less chance things can go wrong

ž

of Asexual Reproduction

Disadvantages:

žLess genetic diversity means less chance of
survival if the environment changes

žDisdvantages:

​Less genetic variation (differences)

Sexual Reproduction

žproduction of offspring by 2
parents

žEach parent contributes half the genetic material

Sexual Reproduction in Plants

Pollen(male) + 0vule (female) --> seed (multi-celled)--> new offspring

Sexual Reproduction in Animals

Advantages & Disadvantages

of Sexual Reproduction

žAdvantages:

žGreater genetic variation

žDisadvantages:

žUses more energy

žMore chance of mutation – more steps to follow

Sexual Reproduction vs. Asexual Reproduction

2 parents

Genetic Variation

1 parent

Genetically identical to parents

New offspring

1 male

1 Female

Sexual Reproduction vs. Asexual Reproduction

2 parents

Genetic Variation

1 Parent

Genetically
Identical
Offspring

New

Offspring

1 male

1 Female