ZZ-ZW SEX DETERMINATION

The female is heterogametic, and the male is homogametic. The ZZ-ZW system is found in birds, some reptiles, butterflies, some amphibians, and some fishes. 

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#Id: 660

#Unit 3. Fundamental Processes

G-tail is probably generated because there is a specific limited degradation of the C-A–rich strand.

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#Id: 661

#Unit 3. Fundamental Processes

Drosophila telomeres are an exception, consisting of terminal arrays of retrotransposons.

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#Id: 662

#Unit 3. Fundamental Processes

Telomeres cluster on the nuclear envelope just prior to homologous chromosome synapsis during meiosis.

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#Id: 663

#Unit 3. Fundamental Processes

Telomeric clustering on nuclear envelope called as the “bouquet” stage of meiosis, and represents a once-in-a-lifecycle configuration.

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#Id: 664

#Unit 3. Fundamental Processes

The meiotic telomere cluster is visualized by telomere fluorescent in situ hybridization (FISH). Microscopic image of a maize nucleus fixed at meiotic prophase (zygotene stage), subjected to telomere (green) and centromere (white) FISH, and counterstained for total DNA with DAPI (red).

TLS Online TPP Program

#Id: 665

#Unit 3. Fundamental Processes

“Quartets” of G residues is characteristic of Telomere