leptotene : homologus pairing is formed and chromosomes start to get closer to each other.
zygotene: synapsis is formed between homologus chromosomes which is apoint oattachment.
pachytene:crosing over occer that homologus chromosomes exchange THIER GENETIC METERIALS.
DIPLOTENE: chiasmata formation disapear which was formed in pachytene.
diakinasis:homologus chromosomes start to seperate from each other.
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The coronary<span> arteries are the network of blood vessels that carry oxygen- and nutrient-rich blood to the cardiac muscle tissue. The blood leaving the left ventricle exits through the </span>aorta<span>, the body's main artery.</span>
Answer:
An inducer (b) stimulates the synthesis of the needed enzyme.
Explanation:
A repressor is bound to the operator in the DNA chain inhibiting the synthesis of a needed enzyme. When the inducer binds to the repressor, this one change its shape and as a result, the repressor is not bound to the promoter anymore starting the synthesis of a specific enzyme.
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