In general, PGCs migrate through the midgut and arrive in the fetal gonads, where meiosis occurs in females and mitosis arrests in males. (B) In Drosophila melanogaster germ cells are derived from GSCs. Meiosis occurs in L3 larval instar stage in the male, GSCs shift from the apical pole ...
Sequencing depth differences between males and virgin females (Supplementary Fig.2a, b) reveal that the largestB. malayichromosome (24.9 Mb) is the X chromosome (Table1). To determine which regions of the genome were 1Nor 2N, we calculated the number of copies per cell (N) of chromosom...
Sex differences in metabolic pathways may contribute to sex differences in cancer development, progression, and treatment response. During development and throughout adulthood, males and females utilize nutrients differently. Males favor carbohydrate and amino acid metabolism, while females favor fatty acid ...
To investigate whether normal meiosis was completed in clone D of Carassius gibelio, we collected different stage maturing oocytes and mature eggs from the artificial induction spawning females. Firstly, the cryo-sections of previous stage oocytes were stained by PI red fluorescence and DAPI blue fluo...
The genital ridge is composed of somatic cell lineages and germ cells. However, these two lineages are formed at different developmental stages and positions in the embryo. Progenitor cell formation of germ cells begins with activation of PR domain zinc finger protein (Prdm) 1 (also known asBlim...
Although all studies agree that sex chromosome condensation begins earlier than the condensation of autosomes in spermatocytes (the cell type in which meiosis occurs), there are periods during meiosis that the X chromosome is decondensed and other periods in which no differential condensation between ...
in females having a male phenotype. It is interesting to note that the thermosensitive period of sex differentiation in medaka lies between developmental stages 5 to 6 (8 to 16 cells) and 36 (heart development stage) [42], which is just before expression ofdmybegins (stage 36). It is ...
C. and Valente, V. L. S. 2004. Meiosis in Drosophila willistoni and D. paulistorum females. A Hereditas 141: 89 A93.Santos-Colares M. C. and Valente V. L. S. , ( 2004 ). Meiosis in Drosophila willistoni and D. paulistorum females . Hereditas 141 : 89 – 93 ....
In sexually reproducing animals, oocytes arrest at diplotene or diakinesis and resume meiosis (meiotic maturation) in response to hormones. Chromosome segregation errors in female meiosis I are the leading cause of human birth defects, and age-related changes in the hormonal environment of the ovary...
in females having a male phenotype. It is interesting to note that the thermosensitive period of sex differentiation in medaka lies between developmental stages 5 to 6 (8 to 16 cells) and 36 (heart development stage) [42], which is just before expression ofdmybegins (stage 36). It is ...