BISC 202 Lecture Notes - Lecture 18: Chromosome
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31 Dec 2017
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The syntenic genes A and Z are linked. A cross between two parents, AAzz and aaZZ, produces F1 progeny with the AaZz genotype. What are the possible arrangements of alleles on the F1 progeny's chromosomes?
A/Z or a/z |
Aa/Zz |
AZ/az |
AZ/Az or az/aZ |
Az/aZ |
The answer is not AZ/az
Genes that are on the same chromosome can assort independently when
Genes that are on the same chromosome can assort independently when
they are very close together on a chromosome and crossing over occurs rarely between the genes. |
they are far apart on a chromosome and crossing over occurs rarely between the genes. |
they are far apart on a chromosome and crossing over occurs frequently between the genes. |
they are syntenic. |
Genes on the same chromosome cannot assort independently. |
Please help me with these two!
X chromosome inactivation in females is best described by which one of the following statements?
Produces dosage compensation for X-linked genes. |
Involves all genes on the X chromosome. |
Is associated with demethylation of the inactivated chromosome. |
Occurs during adolescence. |
Is responsible for the phenotypic abnormalities that occur in girls with Turner syndrome (45,X). |