Before the 1900s, inheritance was thought to be blended. In other words, a father who was tall and a mother who was short would often have children who were of medium height. Indeed, this is often seen. As another example, a father with dark skin and a mother of lighter skin will often have children who have skin tones intermediate between their parents. How is this explained in light of modern
genetics?
What will be an ideal response?
Many morphological characteristics (like height, skin color etc.) are controlled by more than one gene. Therefore, the outcomes of such matings appear to be "blended," but are not.
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Depending on the type of regulatory mechanism, activators and repressors can bind to operator regions which control transcription
Indicate whether the statement is true or false.
Distinguish among interphase, mitosis, and cytokinesis.
(a) Interphase: (b) Mitosis: (c) Cytokinesis:
Vertical evolution arises from Select all that apply.
_____ genetic mutations. _____ sexual reproduction. _____ bacterial conjugation. _____ gene duplication. _____ interspecies exchange of genes.
What benefit do animals get from having very long loops of the nephron?
A) They can send more water back to circulation. B) They can excrete more salt. C) They can send more glucose back to circulation. D) They make less nitrogenous waste products.