Formation of ascopores in Neurospora 1st meiotic division 2 nd - - PowerPoint PPT Presentation

Diploid meiocyte 1st meiotic division 2nd meiotic division mitosis Mature ascus with 8 ascospores

Formation of ascopores in Neurospora

Diploid meiocyte 1st meiotic division 2nd meiotic division mitosis Mature ascus with 8 ascospores

Segregation of a gene for dark vs light spore colour

Diploid meiocyte 1st meiotic division 2nd meiotic division mitosis Mature ascus with parental types

Independent assortment of two genes in Neurospora. Dark (D) vs Light (d), and smooth (S) vs rough (s). (this Cross of parental lines DS x ds Diagram shows ascus formation in the F1.

Diploid meiocyte 1st meiotic division 2nd meiotic division mitosis Mature ascus with recombinant types

Independent assortment of two genes in Neurospora. Dark (D) vs Light (d), and smooth (S) vs rough (s). (this Cross of parental lines DS x ds Diagram shows ascus formation in the F1.

Histogram of x

x Frequency 1 2 3 4 1000 2000 3000

Distribution of height from an F2 segregating for two independently assorting genes with additive effects on height. Height

From Shore and Triassi (1998). American Journal of Botany 85:328-332. Paternally biased cpDNA inheritance in Turnera ulmifolia (Turneraceae).

CAPS polymorphism showing biparental inheritance of chloroplast DNA. Adjacent pairs of lanes involve DNA extraction from dark vs green patches showing unusual biparental inheritance of chloroplast DNA

A pedigree showing and example of the inheritance of a trait determined by a mutation in a mitochondrial

• gene. Shows strict female transmission of the trait.