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3.2
Sexual Reproduction and the Diversity of Life
9
Biology
9th Grade
04/17/2013

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Term
fertilization
Definition
The joining or fusing of two gametes
sperm (n)+ egg (n)=zygote (2n)
Term
diversity
Definition
There is a vast amount of variation, or diversity, among the different species.
Term
dominant allele
Definition
will express its trait (the trait will show up in a person’s appearance) if it is present.
Term
recessive allele
Definition
will only be expressed if both chromosomes contain the recessive allele.
Term
incomplete dominance
Definition
two different alleles produce a mixture of the traits
Term
Codominance
Definition
occurs when both traits are expressed in one individual.
Term
vast diversity
Definition
Some characteristics are controlled by more than one gene or there are more
than two alleles of the gene.
Term
advantage of sexual reproduction
Definition
the offspring are genetically different from their parents and from each other.
Term
disadvantage of sexual reproduction
Definition
-an individual needs to find a mate.
produce fewer offspring
-a lot slower
-have to grow and develop before they start to produce gametes
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