mjl1717
Forum Hero
Topics: 958
Posts: 5,465
|
answer -c?
___________________
Smell the coffee! "Is That an Osler move??"
|
|
|
no, please try again.
|
| mjl1717
Forum Hero
Topics: 958
Posts: 5,465
|
d?
___________________
Smell the coffee! "Is That an Osler move??"
|
|
|
the correct answer is A. Here is the explanation, i copied it from a question book for step 1. This is their explanation:
Asa many as 100 to 1000 gene families contain similar sequences. B-Tublins and B-like globins are perfect examples of duplicated gene families. At least 2 nonfunctional regions in the human B-like globin gene cluster have sequences similar to functional B-like genes. Analysis of their DNA sequences shows that they retain their intron-exon structure, but some sequence drift has resulted in sequences that block transcription or terminate protein translation. Some gene duplications, such as those for ribosomal RNA (rRNA) and tRNA, along with genes coding fort histones, are necessary to meet the demands of the cell for messenger RNA (mRNA) transcripts. Althought there is no accepted model for duplication, it is thought to involve unequal crossover during meiosis.
|
| mjl1717
Forum Hero
Topics: 958
Posts: 5,465
|
Wow! Thank You :?
___________________
Smell the coffee! "Is That an Osler move??"
|
|
| |
| | | | | |
