Chromosome problems in senior high school biology

1. No, this picture is the chromosome picture of metaphase mitosis, and every chromosome has been copied. Because metaphase chromosomes are clear and easy to distinguish. Therefore, metaphase chromosomes are commonly used in karyotype analysis. Under normal circumstances, each chromosome in the body has only one chromatid, and its shape is chaotic.

2. Each pair of chromosomes in the above picture is called homologous chromosome, including two chromosomes, one from the male parent and the other from the female parent, that is, x( 1) and x(2) are from the male parent and the female parent respectively.