Which of the following statements is false?
the number of chromosomes is different in different organisms.
there are more genes in a cell than there are chromosomes.
a single gene can only influence a single trait.
the karyotypes for a male human and a female human look different.

The false statement is "A single gene can only influence a single trait".

Explanation:

A single gene can control or influence one or more than one trait. The ability of a single gene to control or affect more than one character or trait is called pleiotropy. However, according to one gene-one enzyme hypothesis gene act through enzyme production that each gene is responsible for single enzyme that affects a single step in a metabolic process.

the correct answer is sex-linked recessive.

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