In humans, one pair of autosomes (chromosome 4) has a short arm and a long arm. On the short arm is a gene for Huntington disease(H) and on the long arm is a gene for red hair(R).
I have to draw a labelled diagram to show the chromatids of a diploid cell at the end of anaphase I of meiosis for a person who is heterozygous for both characters. All the sites I have been on haven't really showed the diagram I need. Any ideas where to look?
To draw a labelled diagram of the chromatids of a diploid cell at the end of anaphase I of meiosis for a person who is heterozygous for both the Huntington disease gene and the red hair gene, you can follow these steps:
1. Start by understanding the concept of meiosis and anaphase I. Meiosis is a type of cell division that produces gametes (sperm or eggs) with half the number of chromosomes as the parent cell. Anaphase I is the stage in meiosis I where homologous chromosomes separate.
2. Determine the genotype of the individual. Since the person is heterozygous for both Huntington disease (H) and red hair (R), they have the alleles Hh and Rr. This means that on one chromosome 4, they have the Huntington disease gene (H) on the short arm and the red hair gene (R) on the long arm, while on the other chromosome 4, they have the normal allele (h) on the short arm and the normal allele (r) on the long arm.
3. Find resources that visually explain meiosis and provide diagrams of the various stages. Good places to look would be biology textbooks, educational websites, or online resources that focus on genetics and meiosis.
4. Use the diagrams from your chosen resource as references to create your own labelled diagram. Start by drawing two sets of chromosomes, representing the homologous pair of chromosome 4. On one chromosome, label the short arm as "H" and the long arm as "R." On the other chromosome, label the short arm as "h" and the long arm as "r." This reflects the heterozygous genotype for Huntington disease and red hair.
5. At the end of anaphase I, the homologous chromosomes will separate. So, in your diagram, make sure to show the two separated sets of chromosomes, each with one of the chromatids.
Remember to label your diagram clearly and accurately to represent the heterozygous genotype for both Huntington disease and red hair.
If you are unable to find specific diagrams for anaphase I of meiosis for a person with these specific characteristics, you could try a general diagram of anaphase I and modify it to include the relevant gene locations.