Synapsis initiates formation of a protein bridge called the synaptonemal complex, a tri-layer protein structure that maintains synapsis by tightly binding ________ of homologous chromosomes to one another
Fill in the blank(s) with correct word
nonsister chromatids
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C. hyperpolarized, decreases Upon emerging from a darkened area like a movie theater during daylight, our eyes are initially extremely sensitive to light. This is because
A. our pupils are wide open and take some time to close. B. the proportion of our retinal in the cis- conformation is high. C. the proportion of our retinal in the trans- conformation is high. D. our rods and cones are already highly hyperpolarized from the previous dark conditions. E. All of the answers are correct.
The rbcL gene, which has been useful in evolutionary studies in plants, is located in ____
a. mitochondrial DNA b. chloroplast DNA c. nuclear DNA d. mitochondrial and chloroplast DNA e. chloroplast and nuclear DNA
What is the main role of T cells in the immune response?
A. To recognize sites of infection B. To stimulate the production of immune cells C. To secrete antibodies D. To trigger clonal selection
An X-linked recessive gene (c) produces red-green color blindness. A normal woman whose father was color blind marries a color-blind man. What are the chances that the first son will be color blind?
A. 0% B. 25% C. 50% D. 75% E. 100%