Trait controlled by a gene on a sex chromosome; often described as either X-linked or Y-linked.

What will be an ideal response?


sex-linked

Biology & Microbiology

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Steroid hormones are large communication molecules that are modified cholesterol molecules. How do you think they enter a cell?

A) Their size probably allows them to diffuse through the plasma membrane. B) Their lipid nature probably allows them to diffuse through the plasma membrane. C) Their protein structure probably allows them to diffuse through the plasma membrane. D) They must require a protein transporter, because the plasma membrane is completely impermeable to molecules.

Biology & Microbiology

Antibody-mediated immunity is particularly effective against

A) extracellular pathogens. B) intracellular pathogens. C) both extra- and intracellular pathogens. D) None of the answers are correct.

Biology & Microbiology

The introduction of invasive species may increase the environmental resistance for a native species

Indicate whether the statement is true or false

Biology & Microbiology

Which is NOT a component of RNA? 

A. deoxyribose B. adenine C. phosphate D. uracil

Biology & Microbiology