The chromomeres are present during leptotene phase of prophase I during meiosis.
2.
In mice, leptotene, zygotene and early pachytene are enriched for FANC proteins.
3.
When the PMCs are in leptotene-zygotene, very few tapetal nuclei are in endomitosis.
4.
In the non-mutant mouse, FANCG protein is expressed in spermatogonia, preleptotene spermatocytes and spermatocytes in the leptotene, zygotene and early pachytene stages of meiosis.
5.
Irradiation during the leptotene-zygotene stages of meiosis, that is, prior to the pachytene period in which crossover recombination occurs, was found to increase subsequent chiasma frequency.
6.
In the non-mutant mouse, FANCD2 is expressed in spermatogonia, pre-leptotene spermatocytes, and in spermatocytes in the leptotene, zygotene and early pachytene stages of meiosis.
7.
In the non-mutant mouse, FANCD2 is expressed in spermatogonia, pre-leptotene spermatocytes, and in spermatocytes in the leptotene, zygotene and early pachytene stages of meiosis.
8.
The synizetic knot ( Synizesis ) was later found to be a technical artifact induced by the feature of strong acidic fixatives used during that time ( e . g ., Flemming's strong fixative ) to precipitate the thread-like delicate chromosomes of the Leptotene stage of first meiotic prophase into a dark staining knot [ 2, 3 ].
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