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Lesson 4.1: Patterns of Reproduction
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Acquired traits are______________
traits animals develop during their lifetime
What is polygenic inheritance?
different genes are expressed together to produce the trait
What is an example of multiple alleles?
Blood type
What are multiple alleles?
In multiple alleles, one trait has more than two alleles.
What is an example of codominance?
a flower with white petals reproduce with red petals resulting in a red flower with white steaks.
What is codominance?
Codominance results in both alleles being expressed at the same time.
An example of incomplete dominance
sheep with black fleece and white fleece reproducing resulting in a gray fleece sheep
Incomplete dominants results in offspring that are a _____________
Mixture
In order for a recessive trait to show,
both parents must pass on the recessive trait
If offspring inherited a dominant allele from one parent, the offspring will show
dominant traits
What is an allele?
forms of a gene.
What is Inheritance?
the process by which an offspring receives genes from its parents.
What are the advantages and disadvantages of asexual reproduction?
Advantage: do not have to find a mate and can produce many offspring quickly. Disadv: They are exact copies of their parents which is a problem if env changes.
What is a trait?
A specific characteristic that an organism can pass to its offspring through its genes
Where do the offspring's chromosomes come from?
half from father and half from mother
What is fertilization?
sexual reproduction involving an egg cell and a sperm cell joining to form a new cell
two parents combine their genetic material to produce a new organism which differs from both parents is called
sexual reproduction
What is budding?
a form of asexual reproduction in which a new animal grows out from the parent until it fully matures and breaks off.
What is fragmentation?
a kind of asexual reproduction in which a new organism forms from a piece of the original.
What are the two kinds of asexual reproduction?
Fragmentation and budding
A reproductive process that involves only one parent and produces offspring that are genetically identical to the parent is called
asexual reproduction
What are the two methods animals produce offspring?
Sexual and asexual reproduction
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