Speciation: A new role for reinforcement
Article Abstract:
Speciation requires complete reproductive isolation between the two allopatric populations of the S lineage. It is observed that all S and isolate state of the S linegae (iS) females chose the male call of their own group when given a choice between iS and S male cells. It is therefore questionable whether speciation is complete between iS and S and premature to conclude that reinforcement can be the 'sole cause of speciation' between allopatric populations.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2006
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Autosomes behaving badly
Article Abstract:
Papaya sex chromosomes look like autosomes, but they behave as sex chromosomes, where there is a reduced recombination on part of the Y-chromosomes. It is found that sex chromosomes evolve from a single pair of autosomes, initially via the inhibition of recombination in the region containing the sex determination loci, which is in direct contrast to the sex chromosomes of humans where recombination is suppressed across the majority of the Y chromosome.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 2004
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Mutational analysis of RAG1 and RAG2 identifies three catalytic amino acids in RAG1 critical for both cleavage steps of V(D)j recombination
Article Abstract:
Research was conducted to determine the role of acidic amino acid residues in the catalysis of DNA cleavage by the RAG proteins. Results show that three acidic amino acids of RAG1 protein are critical for both nicking and hairpin formation in the DNA cleavage process.
Publication Name: Genes & Development
Subject: Biological sciences
ISSN: 0890-9369
Year: 1999
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