Help required, Gametes are produced in the process of meiosis. In humans, one pair of autosmes (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).
Draw a labelled diagram to show the chromatids of a diploid cell at the end of anaphase 1 of meiosis, for a person who is heterozygous for both characters
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To draw a labelled diagram of the chromatids of a diploid cell at the end of anaphase 1 of meiosis for a person who is heterozygous for both the Huntington disease gene (H) and the red hair gene (R), follow these steps:
Step 1: Draw two pairs of homologous chromosomes. Each pair consists of one long arm and one short arm.
Step 2: Label each chromosome with its corresponding gene. On the short arm of one pair, label it as "H" for Huntington disease gene. On the long arm of the same pair, label it as "R" for red hair gene.
Step 3: For the other pair of chromosomes, label the short arm as "h" for the normal non-Huntington disease allele and the long arm as "r" for the normal non-red hair allele.
Step 4: Now, during anaphase 1 of meiosis, the homologous chromosomes separate and move towards opposite poles of the cell. Draw an arrow showing the direction of the separation for each chromatid within the pair.
Step 5: At the end of anaphase 1, each separate chromatid is now labelled to indicate whether it carries the Huntington disease gene (H or h) and the red hair gene (R or r). Label one chromatid as "HR", another as "Hr", another as "hR", and the last one as "hr".
Step 6: Finally, you can add additional labels to indicate the diploid cell and the stage of meiosis (anaphase 1).
Your completed labelled diagram should show two pairs of homologous chromosomes with different alleles for the Huntington disease gene (H and h) and the red hair gene (R and r). Each chromatid resulting from anaphase 1 should be labeled as HR, Hr, hR, or hr, indicating the different combinations of alleles.