Question

what are homologous chromosomes?
a maternal and paternal chromosome that have the same genes
any two chromosomes found together in a single gamete after meiosis
a paternal y and a maternal x chromosome present together in males
two copies of the same chromosome that result after replication during meiosis

Explanation:

Homologous chromosomes are pairs of chromosomes (one from each parent) that have the same genes at the same loci. Option 1 correctly describes this as a maternal and paternal chromosome with the same genes. Option 2 is incorrect because gametes after meiosis have only one set of chromosomes (no homologous pairs). Option 3: While X and Y are sex chromosomes, they are not homologous in the traditional sense as they have different gene content. Option 4 describes sister chromatids (after replication) not homologous chromosomes.

Answer:

a maternal and paternal chromosome that have the same genes