Color Vision Depends Upon the Dominant Alleles of Three Genes

question 23

Multiple Choice

Color vision depends upon the dominant alleles of three genes: the R gene and the G gene are both on the X chromosome, while the B gene is autosomal.Recessive mutations in any of the three genes can cause color blindness.Suppose a colorblind man marries a colorblind woman and all of their offspring have normal vision.What is the genotype of the woman?

• A)RRGGbb
• B)RRggBB
• C)rrGGbb
• D)RRggBB or RRGGbb
• E)rrGGbb or rrggBB

Identify the characteristics and implications of action potentials in neurons.

Describe the functions and properties of ion channels and their role in neuron activity.

Understand the mechanisms underlying synaptic transmission and the types of synapses.

Learn about the role of the sodium-potassium pump and ion concentration gradients in establishing the resting membrane potential.

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