Answer for 11. Thanks .d52% 11:14AM //online.v.talsource.com |2| Propose a possi
ID: 191836 • Letter: A
Question
Answer for 11. Thanks
.d52% 11:14AM //online.v.talsource.com |2| Propose a possible explanation. 11. EVOLUTION CONNECTION Crossing over is thought to be evolutionarily advantageous because it continually shuffles genetic alleles into novel combinations. Until recently, it was thought that the genes on the Y chromosome might degenerate because they lack homologous genes on the X chromosome with which to pair up prior to crossing over. However, when the Y chromosome was sequenced, eight large regions were found to be internally homologous to each other, and quite a few of the 78 genes represent duplicates. (Y chromosome researcher David Page has called it a "hall of mirrors.) Explain what might be a benefit of these regions. 12. SCIENTIFIC INQUIRY DRAW IT As sume you are mapping genes A, B, C, and D in Drosophila. You know thatExplanation / Answer
Answer
Y chromosome is not degenerate but it amplified and taken over to a whole chromosome. Y have long been exchange between themselves by intrachromosomal recombination. Such self exchange of genes and duplication maintains the chromosome length and avoid of undergoing degenerate.