Spleen-shape as a genetic marker in X/Gf mice

Area of Science:

• Genetics
• Immunology
• Developmental Biology

Background:

• The X/Gf mouse strain exhibits a unique triangular spleen morphology.
• The C3H mouse strain possesses a normal spleen shape and an agouti coat color.
• Understanding the genetic basis of morphological traits is crucial in developmental biology.

Purpose of the Study:

• To investigate the mode of inheritance for the triangular spleen shape in X/Gf mice.
• To determine the genetic basis of coat color variation between X/Gf and C3H mouse strains.
• To analyze the relationship between spleen morphology and coat color genetics.

Main Methods:

• Pedigree analysis of X/Gf and C3H mouse crosses.
• Observation and documentation of spleen shape in offspring.
• Coat color assessment in F1 and F2 generations.

Main Results:

• The triangular spleen shape of X/Gf mice is genetically dominant over the normal spleen shape of C3H mice.
• The agouti coat color of C3H mice is dominant over the white coat color of the X/Gf strain.
• Segregation patterns suggest Mendelian autosomal inheritance for both traits, involving two independent genes.

Conclusions:

• The triangular spleen morphology and white coat color in X/Gf mice are likely controlled by independently assorting Mendelian autosomal genes.
• While preliminary, the data supports a model of simple dominant inheritance for these traits.
• Further studies with larger F2 populations are needed to statistically confirm the segregation ratios and genetic model.