Personal knowledge

Ferguson family knowledge

Ferguson family knowledge · Helen Stallman · 1 Sep 2026

Informant: Helen Stallman
Date: 1 Sep 2026
Medium: family_knowledge
Held by: Helen Stallman

Added manually

Helen Stallman entered the affected and carrier status of her Gray/Ferguson relatives in this application on 1 September 2026 (audit log entries 12807-12815, extended 14882-14891 and 37789-37790). Only Andrew Lachlan Stallman's status is established by the PreventionGenetics report (source 1576), and only Helen's own obligate-carrier status follows from it. Every other person's status rests on this family knowledge, and is cited here rather than to the laboratory report, which does not name them.

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Ferguson family knowledge Questionable

Ferguson family knowledge · Helen Stallman · 1 Sep 2026

For “Medical” 1881 of James Gray

Retinitis Pigmentosa - X-Linked hemizygous in the RPGR gene for two nucleotide deletion designated c.2426_2427delAG

Family knowledge entered by Helen Stallman on 1 September 2026. James Gray is Phyllis's father, and this is the least evidenced link in the chain. If he was affected, Phyllis is an obligate carrier and the variant entered the family before her; if he was not, it may begin with Phyllis herself or with her mother Sarah Simpson Hunt. Worth a family answer.