Biology of the Laboratory Mouse

Figure 21-2. Coat colors of mice.

Albino mouse Nonagouti brown dilute piebald spotting mouse

A. Albino ( c/ c); no pigment. B. Nonagouti brown dilute piebald spotting ( a/ a b/ b d/ d s/ s); recessive type of spotting due to s allele; pigmented areas diluted because of d allele.

Nonagouti white mouse Nonagouti viable dominant spotting mouse

C. Nonagouti white ( a/ a Mi^wh /+); dominant spotting especially on ventrum, reduction of hair pigment in pigmented hairs. D. Nonagouti viable dominant spotting ( a/ a W^v/+) ( Chapter 17, pleiotropism).

Nonagouti patch viable dominant spotting mouse Varitint-waddler mouse

E. Nonagouti patch viable dominant spotting ( a/ a Ph W^v/+ +); hyperadditive interaction between Ph and W^v. F. Varitint-waddler ( Va/+); variegation (mosaicism) not due to X-chromosome inactivation.

Nonagouti tortoise mouse Cattanach translocation

G. Nonagouti tortoise ( a/ a To/+); variegation attributed to X-chromosome inactivation. H. Cattanach translocation. Segment of chromosome I inserted in the X chromosome; variegation attributed to X-chromosome inactivation.


A. Albino ( c/ c); no pigment.		B. Nonagouti brown dilute piebald spotting ( a/ a b/ b d/ d s/ s); recessive type of spotting due to s allele; pigmented areas diluted because of d allele.

C. Nonagouti white ( a/ a Mi^wh /+); dominant spotting especially on ventrum, reduction of hair pigment in pigmented hairs.		D. Nonagouti viable dominant spotting ( a/ a W^v/+) ( Chapter 17, pleiotropism).

E. Nonagouti patch viable dominant spotting ( a/ a Ph W^v/+ +); hyperadditive interaction between Ph and W^v.		F. Varitint-waddler ( Va/+); variegation (mosaicism) not due to X-chromosome inactivation.

G. Nonagouti tortoise ( a/ a To/+); variegation attributed to X-chromosome inactivation.		H. Cattanach translocation. Segment of chromosome I inserted in the X chromosome; variegation attributed to X-chromosome inactivation.