Question

1. ____ is the basic unit of heredity; many of them contain the code for a specific proteins. each __ contains many ____.

a) a gene; chromosome; genes
b) a chromosome; gene; dna molecules
c) a chromosome; chromosome; genes
image of a cell, nucleus, chromosome, dna, gene (segment of dna) structure hierarchy

Explanation:

The question is about the basic unit of heredity and the structure containing genetic code. A gene is the basic unit of heredity, and chromosomes contain many genes. Each gene codes for a specific protein. So the correct option should match this relationship. Option A states "A gene; chromosome; genes" which fits: gene is the basic unit, chromosomes contain many genes, and each gene codes for a protein.

Answer:

A. A gene; chromosome; genes