Asexual vs Sexual Reproduction 1 Asexual Reproduction Requires

  • Slides: 17
Download presentation
Asexual vs. Sexual Reproduction 1

Asexual vs. Sexual Reproduction 1

Asexual Reproduction ● Requires only one parent ● Offspring have 100% the same chromosomes

Asexual Reproduction ● Requires only one parent ● Offspring have 100% the same chromosomes as the parent. ● In other words, the offspring are exact “clones” of the parent. ● Most unicellular organisms reproduce this way. ● Mitosis 2

Asexual Reproduction ● Binary Fission ● Bacteria ● Protists Binary fission is a form

Asexual Reproduction ● Binary Fission ● Bacteria ● Protists Binary fission is a form of asexual reproduction where every organelle is copied and the organism divides in two. 3

Asexual Reproduction ● Plant cuttings Vegetative reproduction is a type of asexual reproduction in

Asexual Reproduction ● Plant cuttings Vegetative reproduction is a type of asexual reproduction in plants that relies on multi-cellular structures formed by the parent plant. It has long been exploited in horticulture and agriculture, with various methods employed to multiply stocks of plants. 4

Asexual Reproduction ● Budding ● Hydra Budding is a means of asexual reproduction whereby

Asexual Reproduction ● Budding ● Hydra Budding is a means of asexual reproduction whereby a new individual develops from an outgrowth of a parent, splits off, and lives independently. 5

Asexual Reproduction ● Fragmentation is a means of asexual reproduction whereby a single parent

Asexual Reproduction ● Fragmentation is a means of asexual reproduction whereby a single parent breaks into parts that regenerate into whole new individuals. 6

Asexual Reproduction ● Regeneration occurs when a body part has broken off and the

Asexual Reproduction ● Regeneration occurs when a body part has broken off and the organism grows a new one. 7

Asexual Reproduction ● Examples of organisms that reproduce asexually ● Hydra ● Sea Star

Asexual Reproduction ● Examples of organisms that reproduce asexually ● Hydra ● Sea Star ● Strawberry ● Archaebacteria ● Euglena ● Paramecium ● Yeast 8

Advantages of Asexual Reproduction 1. Well suited for organisms that remain in one place.

Advantages of Asexual Reproduction 1. Well suited for organisms that remain in one place. 2. Good for organisms that are unable to look for mates. 3. Works well in stable environments – Organisms have adaptations that already work well in this environment. 4. It is more efficient in the organism uses less energy (They don’t need to search or compete for a mate 9

Sexual Reproduction ● Requires two parents that each share ½ of the genetic information.

Sexual Reproduction ● Requires two parents that each share ½ of the genetic information. ● Offspring share the characteristics of each parent. ● Meiosis 10

Sexual Reproduction ● All the members of the Animal Kingdom ● Fish ● Mammals

Sexual Reproduction ● All the members of the Animal Kingdom ● Fish ● Mammals ● Amphibians ● Birds ● Reptiles ● Insects ● Crustaceans 11

Sexual Reproduction ● Plant Kingdom ● Flowers are the reproductive organs of plants. Male

Sexual Reproduction ● Plant Kingdom ● Flowers are the reproductive organs of plants. Male flower Female flower ● Some flowers have both male and female reproductive organs on the same flower. 12

Sexual Reproduction ● Examples of organisms that reproduce sexually ● Chickens ● Iguanas ●

Sexual Reproduction ● Examples of organisms that reproduce sexually ● Chickens ● Iguanas ● Lobsters ● Sharks ● Humans ● Butterflies ● Sunflowers ● Roses 13

Sexual Reproduction ● Happens 2 ways ● Internally (inside) ● The egg is fertilized

Sexual Reproduction ● Happens 2 ways ● Internally (inside) ● The egg is fertilized by sperm inside the female ● Mammals, birds, reptiles, insects, spiders ● Externally (outside) ● The egg is fertilized by sperm outside the female ● The female lays the eggs and then the male fertilizes them. ● Fish and some amphibians ● Plants and fungi (pollen and spores) 14

Benefits of Sexual Reproduction 1. Increases the amount of variations (differences) in a given

Benefits of Sexual Reproduction 1. Increases the amount of variations (differences) in a given population. 2. Populations can adapt (change) to a changing environment. 3. Organisms could have a higher rate of surviving diseases based on variations in the population. 15

Make a Venn Diagram Asexual Reproduction Sexual Reproduction Both Types of reproduction in living

Make a Venn Diagram Asexual Reproduction Sexual Reproduction Both Types of reproduction in living organisms Pass DNA from parent to offspring 16

Summarize ● Write two paragraphs with 6 sentences each describing asexual and sexual reproduction.

Summarize ● Write two paragraphs with 6 sentences each describing asexual and sexual reproduction. ● Paragraph 1: Asexual reproduction is…. . ● Paragraph 2: Sexual reproduction is… 17