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Chapter 6: Reproduction and Developement
Terms in this set (33)
the life process by which new cells arise from existing cells
Reproduction is essential for.....
the survival of a species
Types of reproduction
asexual and sexual
Three Functions of Reproduction
Production of new cells, growth, and survival of the species
1 parent cell and the offspring is identical to the parent
the ability of an organism to regrow a lost body part
Requires two parent cells, male sex cell is the sperm and female sex cell is the egg.
The joining together of the egg cell and the sperm cell, which creates a zygote
Fertilization occurs inside the females body.
Fertilization occurs outside the body.
Result of fertilization, undergoes multiple cellular divisions that result in a multicellular organism. Each cell contains identical genetic material.
The process in which the fertilized egg grows specialized tissues which develop into organs and organ systems before birth.
A series of changes the organism undergoes during its development from egg to adult. Examples of organisms are insects and amphibians.
The process in which the structures and functions of the body system weaken.
A short underground stem containing stored food.
The reproductive organ of a plant. Females eggs are produced here.
Produced in the flower, contain sperm cells. Can be carried by wind, insects, rain, and birds.
The transfer of pollen to the ovary (fertilization).
Three Conditions for Germination
Proper temperature, oxygen, and water.
The passage of genetic traits from one generation to the next.
Contain genetic material, composed of genes that contain DNA, found in the nucleus of cells.
Control the development of a trait, a pair of genes control each trait, passed on from one generation to the next. In sexual reproduction, half of the genes come from each parent and in asexual reproduction all of the genes come from one parent.
Are the traits that will usually appear in the individual.
Are hidden by the dominant gene. In order for offspring to express the recessive gene, both inherited genes must be recessive.
Shows the probable results of a genetic cross of two parents. It shows the probability of a trait being expressed in the offspring.
Trace a genetic trait in a family tree. It shows the presence or absence of a particular trait in each member of a generation.
Human cells contain....
thousands of different genes needed to produce a human being
Number of chromosomes in a normal body cell
Number of chromosomes in a human sex cell
Due to a defective recessive gene, commonly linked to the X chromosome
A change in a gene which can cause the sudden appearance of a new trait in the offspring. Most mutations are harmful to the offspring and therefore the offspring do not survive. Some help the organism to adapt to changes in their environment.
Small differences between generations can...
result in a new species
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