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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 human's 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 contain the same , but may have different.

Answer 1

Start by breaking down the question:

1. Homologous Chromosomes: A pair of chromosomes, one inherited from each parent (one from the mother, one from the father).
2. Locus: The specific position on a chromosome where a gene is located.
3. Alleles: Different versions of a gene found at the same locus on homologous chromosomes.

You need two individuals (biologically defined as parents) to contribute one chromosome each to form a homologous pair. These chromosomes contain the same genes in the same order, but the alleles may differ, which allows for variation in inherited traits.

All of this is explained more deeply at:

🔗 https://www.genomicseducation.hee.nhs.uk/genotes/knowledge-hub/gene/