Consider the true diploid plant cell (2n=4) below. The paternally derived blue chromosomes are of two types, metacentric and acrocentric. These chromosomes contain the same gene pattern and structural features as the maternally derived purple chromosomes. Consider two genes A and B which are found on the metacentric and acrocentric chromosome pairs, respectively. Assume the father passed on A and B alleles, and the mother passed on a and b alleles. a. Show the possible loci of these genes (specify alleles) on the image on the left. Label both sister chromatids in each chromosome. (Note: Sister chromatids are products of replication.) b. Draw the four possible gametes formed after meiosis assuming there was no crossing over. Label the gene loci.
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Consider the true diploid plant cell (2n=4) below. The paternally derived blue chromosomes are of two types, metacentric and acrocentric. These chromosomes contain the same gene pattern and structural features as the maternally derived purple chromosomes. Consider two genes A and B which are found on the metacentric and acrocentric chromosome pairs, respectively. Assume the father passed on A and B alleles, and the mother passed on a and b alleles.
a. Show the possible loci of these genes (specify alleles) on the image on the left. Label both sister chromatids in each chromosome. (Note: Sister chromatids are products of replication.)
b. Draw the four possible gametes formed after meiosis assuming there was no crossing over. Label the gene loci.