Brooker_Chp7P - Chapter 7 Non-Mendelian Inheritance...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 7 Non-Mendelian Inheritance
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Non-Mendelian Inheritance Maternal effect - genotype of mother dictates phenotype Epigenetic - modification of nuclear gene alters somatic cell phenotype, but not ‘permanently’ Extranuclear - inheritance of mitochondrial or chloroplast DNA governs phenotype
Background image of page 2
Shell coiling in Limnea Dextral = Right-handed spiral Sinistral = Left-handed spiral Reciprocal cross
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Events in oocyte production: Nurse cells deposit gene products in egg
Background image of page 4
X-Chromosome “inactivation” achieves dosage compensation in some species Barr body – condensed X
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
X-chromosome inactivation explains female mosaics for X-linked genes
Background image of page 6
Heterozygous females are mosaics for genes on X chromosome X + produces non-orange, usually black fur X o produces orange fur X + X o females & Lyon hypothesis - orange patch X o expressed from clone of cells w/ X + ‘silent’ - black patch X + expressed from clone of cells w/ X o ‘silent’
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Molecular evidence supports gene expression from one – not both – X alleles Female skin tissue from heterozygote
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 22

Brooker_Chp7P - Chapter 7 Non-Mendelian Inheritance...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online