BIO 202 Chapter 15: Chapter 15 Learning Objectives

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Chromosome theory of inheritance chromosomes carry hereditary material; the behavior of chromosomes during gamete formation and fertilization is the physical mechanism that"s responsible for inheritance. During early embryonic development in humans, there is a mass of tissue that is an unspecified gonad. Sry gene is a protein that functions as a transcription factor, meaning that it turns on transcription or reading of dna to rna of this gene. Pedigree charts that allow us to track the passage of a particular trait through generations. Disorders: cystic fibrosis inherited as an autosomal recessive gene. If the gene that leads to cystic fibrosis is mutated, it enables a protein called cftr, phenotypes that result from this are issues with the lungs. Cystic fibrosis causes the loss of the cl- transporter, cl- can"t leave the cells, the water doesn"t follow, and the mucus becomes too dehydrated.

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