Figure 5.

Female Tac chromosome identification. (a) Paint Y₁ covers two copies of X₁p, chromosome Y₁ is not present. (b) Paint Y₂ covers the homology regions on two copies of X₂ and X₃; Y₂ is not present. (c) Paint X₃ hybridizes to the chromosome pair X₃. (d) Paint X₅ hybridized to the chromosome pair X₅. (e) Tac meiotic chain configuration. Hybridization with telomeric probe confirms a chain of nine elements. (f) Paint Y₄ identifies the last but one chromosome in the chain. (g) Paint X₄ covers X₄ and Y₃, the seventh and sixth element of the chain, the chain configuration is at the right.