Define epistasis and give an example
What will be an ideal response?
Epistasis is where one set of genes will affect the expression of a different set of genes. An example
would be coat color in Labrador retrievers. In labs, the genes for black and brown fur can be silenced
by the expression of a homozygous recessive allele that blocks pigment production.
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Linked genes are ____
a. genes whose effects combine to influence a single characteristic b. different alleles of the same gene c. genes that affect two different traits and lead to a 9:3:3:1 phenotype ratio in a dihybrid cross d. genes that do not sort independently because they are physically near each other on the same chromosome e. genes on two different chromosomes
End Result of Meiosis II
What will be an ideal response?
The founder effect and bottleneck effect are examples of ____________, an evolutionary mechanism by which the gene pool of a small population changes due to chance.
Fill in the blank(s) with the appropriate word(s).
The thick filaments of a myofibril are composed of
A) myoglobin. B) sarcoplasm. C) actin. D) myosin. E) T tubules.