Recessive traits are expressed only in the homozygous state

a. True
b. False
Indicate whether the statement is true or false


True

Biology & Microbiology

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Which of the following does not reflect the action of an effector molecule on the transcription of a gene?

A. An effector binds to a repressor to decrease the level of transcription. B. An effector binds to a repressor to increase the level of transcription. C. An effector binds to an activator to increase the level of transcription. D. An effector binds to a polymerase to increase the level of transcription.

Biology & Microbiology

The high diversity of pigeons in Papua New Guinea’s tropical rain forests is possible because:

1.They occupy very different niches, so have different forms. 2.Predation of one species by another has diversified their forms. 3.They are able to take advantage of the diversity of food-bearing trees in the forest. 4.They are symbiotic species so size difference does not matter.

Biology & Microbiology

Genetically modifying human ________ cells may directly affect future generations

A) intestinal B) immune C) gametic D) somatic

Biology & Microbiology

The major difference between protostome animals and deuterostome animals is _______.

a) whether or not they reproduce sexually or asexually b) the presence or absence of a gastrovascular cavity c) which opening to the digestive system forms first d) their type of symmetry

Biology & Microbiology