Genetics II: Imprinting in Organisms

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What is the process of imprinting in genetics?

The expression of all genes equally from both parents

The process of gene mutation in somatic cells

A mechanism that alters the hereditary material of an offspring

A process that modifies chromosomes or genomes in the parental generation (correct)

What is the characteristic of imprinting that distinguishes it from classical Mendelian genetics?

It involves only sex-linked genes

It assumes that parental genomes are equivalent

It shows that parental genomes are not equivalent (correct)

It involves only autosomal genes

What is the outcome of imprinting during development?

Loss of all genetic information from one parent

The same expression of genes from both parents

Parent-of-origin-specific expression of certain genes (correct)

Random inactivation of chromosomes

In which generation is imprinting established?

Anew in the germ line in each generation Signup and view all the answers

What is the nature of the changes caused by imprinting?

Stable and inheritable throughout somatic cell divisions Signup and view all the answers

What is an example of imprinting related to sex determination?

Heterochromatinization of paternally derived chromosomes in scale insects Signup and view all the answers

In which generation of flowering plants does imprinting occur?

Gametophytes Signup and view all the answers

What is the result of endosperm with an incorrect ratio of paternally and maternally derived genomes in plants?

Failure to grow properly Signup and view all the answers

Which insect has been found to exhibit imprinting?

Sciara coprophila Signup and view all the answers

What is the role of the Medea gene in Arabidopsis?

Control of seed development Signup and view all the answers

In mammals, what is the effect of imprinting on development?

It has a significant impact on development Signup and view all the answers

What is the characteristic of androgenetic or gynogenetic embryos in plants?

They are more or less normal Signup and view all the answers

What type of zygotes form ovarian teratomas?

Gynogenetic Signup and view all the answers

What is the advantage of using mice in studying imprinting?

They are experimentally tractable Signup and view all the answers

Genetics II: Imprinting in Organisms

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Questions and Answers

What is the process of imprinting in genetics?

What is the characteristic of imprinting that distinguishes it from classical Mendelian genetics?

What is the outcome of imprinting during development?

In which generation is imprinting established?

What is the nature of the changes caused by imprinting?

What is an example of imprinting related to sex determination?

In which generation of flowering plants does imprinting occur?

What is the result of endosperm with an incorrect ratio of paternally and maternally derived genomes in plants?

Which insect has been found to exhibit imprinting?

What is the role of the Medea gene in Arabidopsis?

In mammals, what is the effect of imprinting on development?

What is the characteristic of androgenetic or gynogenetic embryos in plants?

What type of zygotes form ovarian teratomas?

What is the advantage of using mice in studying imprinting?

What is the term for pairs of chromosomes or parts of chromosomes derived from the same parent?

Which gene is imprinted in mice but not in humans?

What is the estimated number of imprinted genes in humans and mice?

What is the result of alterations to imprinted genes in humans?

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