6. Chromosomal Variation

Which of the following represents the chromosomal segregation into gametes after a reciprocal translocation caused by adjacent-1 segregation? N=Normal chromosome T = Tanslocated chromosome

Which of the following ways reciprocal translocated chromosomes are sorted produces viable gametes?

An individual heterozygous for a reciprocal translocation has the following chromosomes. Which chromosomes do the gametes receive after alternative segregation? 

A B • C D E F G                        J K • L M N O P 

A B • C D N O P                       J K • L M E F G 

An individual heterozygous for a reciprocal translocation has the following chromosomes. Which chromosomes do the gametes receive after adjacent-1 segregation? 

A B • C D E F G                J K • L M N O P 

A B • C D N O P               J K • L M E F G 

From the following list, identify the types of chromosome changes you expect to show phenotypic consequences.

Reciprocal balanced translocation

An animal heterozygous for a reciprocal balanced translocation has the following chromosomes:

MN • OPQRST           

MN • OPQRjkl           

cdef • ghijkl           

cdef • ghiST

Among the three segregation patterns, which is least likely to occur? Why?

An animal heterozygous for a reciprocal balanced translocation has the following chromosomes:

      MN • OPQRST

      MN • OPQRjkl

      cdef • ghijkl

      cdef • ghiST

Identify the gametes produced by adjacent-2 segregation. Which if any of these gametes are viable?

An animal heterozygous for a reciprocal balanced translocation has the following chromosomes:

      MN • OPQRST

      MN • OPQRjkl

      cdef • ghijkl

      cdef • ghiST

Identify the gametes produced by adjacent-1 segregation. Which, if any, of these gametes are viable?