Question

the chromosomes in a homologous pair contain the same genes in the same locations. but one chromosome might have a different version of a gene than the other chromosome. different versions of the same gene are known as alleles.
scientists have assigned a number to each homologous pair of chromosomes that make up a humans dna. they use this numbering system to describe where specific genes are found on particular chromosomes. for example, the gene for abo blood type in humans is found on chromosome 9. this gene has a specific location, called a locus, on the chromosome, but the allele can vary. so an individual could inherit the allele for blood type a from their mother, and the allele for blood type b from their father.
complete the paragraph.
each chromosome in a homologous pair is inherited from ____ __. any two homologous chromosomes may have different __, but they contain the same ____.
options:

• a different parent...genes...alleles
• a different parent...alleles...genes
• the same parent...genes...alleles
• the same parent...alleles...genes

Explanation:

The text states that one chromosome in a homologous pair comes from the father and the other from the mother, so each is inherited from a different parent. It also defines homologous chromosomes as having the same genes in the same locations, but potentially different versions of those genes (alleles). This matches the option "a different parent...alleles...genes".

Answer:

a different parent...alleles...genes