Question

a student claims that traits are inherited from parents through chromosomes. which piece of evidence best supports this claim?
a offspring always looks identical to one parent.
b chromosomes are structures that carry genes, and genes determine traits.
c the environment decides which traits organisms express at birth.
d dominant alleles are always visible in every organism.

Explanation:

Chromosomes carry genes which determine traits. This is a fundamental concept in genetics (a sub - field of Biology) that supports the claim about inheritance through chromosomes.

• Option A is incorrect because offspring do not always look identical to one parent due to genetic recombination and other factors.
• Option C is incorrect as the environment can influence trait expression but does not solely decide which traits are expressed at birth (genes play a major role).
• Option D is incorrect because dominant alleles are not always visible in every organism (e.g., in cases of incomplete dominance or recessiveness in some genetic crosses).

Answer:

B. Chromosomes are structures that carry genes, and genes determine traits.