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Much genetic evidence indicates that humans and chimpanzees are very closely related, despite the observation that chimpanzees have 48 chromosomes and we have only 46. At first, the difference in chromosome number was considered significant-so significant that the great apes (chimpanzees, gorillas, and orangutans) and humans were classified into different […]

Parents were concerned about their 16-year-old son for the following reasons: he had no deepening of his voice, scanty pubic and axillary hair growth, absence of beard and mustache growth, small penis, poor muscular development, and psychosocial immaturity. Laboratory evaluation indicated the following: Serum testosterone 100 ng/dL Sperm count 10 […]

Q1. A female rat that is heterozygous for an autosomal reciprocal translocation has 36 eggs that were generated from following 9 meioses: 4 by alternate segregation, 4 by adjacent-1 segregation and 1 by adjacent-2 segregation. She is mated to a chromosomally wild-type male. What is the possibility that her offspring […]

YOUR ASSIGNMENT THIS WEEK is to take the unknown sequence, go the the NCBI web page, and carry out a BLAST search. When you have located the GenBank record that matches this sequence exactly, go to the features table and locate the positions of the exons under the coding sequence […]