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The human and chimpanzee genomes are 98% identical: a. How many nucleotide positions of the human genome differ from the corresponding positions of the chimp genome? Assume that the human genome is 3200 Mb. b. If the coding fraction (that in exons) of the human genome is 1.5% of the […]

It has been conclusively demonstrated that related cells can differ in their metabolic activities under various conditions. For instance, transformed cells (on their way to becoming cancerous) have more active mitochondria than do their non-transformed counterparts. TO obtain clones that differ in the level of metabolic activity associated with their […]

A strain of rhesus monkeys is brachyphalangic (that is, it hasvery short fingers). A monkey breeder wanted to create atrue-breeding strain of brachyphalangic monkeys. To do this, hecrossed brachyphalangic monkeys with one another for severalgenerations. Frustratingly, his crosses always produced mixtures ofbrachyphalangic and normal-finger offspring. Combining the resultsof all the […]

In a coat-color gene, the dominant allele B codes for brown coat in mice, while the recessive b allele codes for yellow coat. However, when two copies of the B allele are present in an embryo, the individual dies before birth. What is the proportion of brown and yellow offspring […]