Non-mendelian Inheritance Flashcards

1
Q

What is epigenetic inheritance

A

A pattern in which a modification occurs to a nuclear gene or chromosome that alters gene expression

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2
Q

What causes epigenetic changes?

A

DNA and chromosomal modifications

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3
Q

Dosage compensation

A

offset differences in the number of active sex chromosomes

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4
Q

What is a mechanism of dosage compensations?

A

DNA methylation; results in gene silencing

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5
Q

How does dosage compensation occur in mammals?

A

The inactivation of a single X chromosomes in females

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6
Q

When does X-Chromosome Inactivation occur?

A

Early in development

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7
Q

In mammals, what does X-chromosome inactivation depend on?

A

The X-inactivation center

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8
Q

If one of the two X-Chromosomes is missing its Xic due to a mutation, a cell counts only ___

A

One Xic and X-chromosome inactivation does not occur

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9
Q

Genomic Imprinting

A

A segment of DNA is marked and the effect is maintained throughout the life of the organism

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10
Q

Maternal effect

A

Involves genes in the nucleus; genes encode RNA and proteins in the egg

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11
Q
A
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