SCI227 Lecture 2: 16_1_teacher_notes
Biology 30
16.1
Unit B
The Male Reproductive System
Reproduction
Is how another organism is made
There are two types:
1. Sexual
2. Asexual
1. Sexual Reproduction
Requires gametes from two individuals to join
Offspring are genetically different from their parents
Produces variation making an organism more or less adapted to the
environment
Traits that are better adapted to the environment are passed on
It is done by both plants & animals
2. Asexual Reproduction
2. Asexual Reproduction
It involves only one parent
The offspring are genetically identical to the parent
It produces little variation
With less variation, there is less chances of survival
It occurs in several ways:
1. Budding
2. Binary Fission
3. Spores
4. Vegetative reproduction
1. Budding:
Involves a parent producing a bud (a smaller version of itself)
(E.g. hydra, yeast, coral)
2. Binary Fission:
One cell splits into two (E.g. bacteria)
3. Spore Production:
Cells called spores are produced (E.g. fungi, some moulds, & ferns)
4. Vegetative reproduction:
Shoots or runners are produced from the plant (E.g. Aspens,
strawberries, purple loofstrife )
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Human Reproduction
The specialized reproductive cells of humans develop within organs
The Male Gonads
Are the testes
Make sperm cells (male gametes)
The Female Gonads
Are the ovaries
Make egg cells (female gametes)
Fertilization
When it occurs the egg and a sperm cell unite and a zygote is produced
The Zygote
The zygote consists of a single cell
It begins to divide rapidly in a process called cleavage to produce an embryo
The embryo grows into a fetus
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find more resources at oneclass.com
Structures of the Male Reproductive System
Structures of the Male Reproductive System
Human male and female sex organs:
Originate in the same area
are indistinguishable from females until the 3 month of embryonic
development
During the last two months of fetal development the testes descend
through a canal to the scrotum
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
There are two types: sexual, asexual, sexual reproduction. Requires gametes from two individuals to join. Offspring are genetically different from their parents. Produces variation making an organism more or less adapted to the environment. Traits that are better adapted to the environment are passed on. It is done by both plants & animals: asexual reproduction, asexual reproduction. The offspring are genetically identical to the parent. With less variation, there is less chances of survival. Involves a parent producing a bud (a smaller version of itself) (e. g. hydra, yeast, coral: binary fission: One cell splits into two (e. g. bacteria) Cells called spores are produced (e. g. fungi, some moulds, & ferns: vegetative reproduction: Shoots or runners are produced from the plant (e. g. The specialized reproductive cells of humans develop within organs. When it occurs the egg and a sperm cell unite and a zygote is produced. The zygote consists of a single cell.
