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Lecture 5 of BIOL3026/BIOL3926 at the University of Sydney

Walter S. Sutton

Proposed the chromosomal theory of inheritance in 1902/03

Sutton-Boveri

The chromosomal theory of inheritance is also known as the ___ theory

1902/03

The chromosomal theory of inheritance was proposed in...

1915

The chromosomal theory of inheritance was widely accepted after evidence supporting it was demonstrated by Thomas Hunt Morgan in...

mitosis

clonal copying of chromosome with no recombination

2c-4c-2c

Chromosome number during mitosis

meiosis

Recombination, creating gamete not identical to parent

4c-2c-1c

Chromosome number during meiosis

leptotene

First part of Prophase I where unpaired univalents are seen

zygotene

Second part of Prophase I where homologue pairing occurs and bivalents form

pachytene

Third part of Prophase I where the bivalents shorten

diplotene

Fourth part of Prophase I where the non-sister chromatids separate and chiasmata are visible

diakinesis

Fifth part of Prophase I where the arms on either side of the chiasmata repel and rotate

pro-metaphase

Sixth part of Prophase I where the bivalents begin to align

Anaphase I

The phase where independent segregation actually happens

reductional division

Anaphase I begins the process of ___

unpaired univalents

What would be observed in leptotene?

formation of bivalents

What would be observed in zygotene?

bivalent shortening

What would be observed in pachytene?

visible chiasmata

What would be observed in diplotene?

arms repel

What would be observed in diakinesis?

bivalents aligned

What would be observed in metaphase I?

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