genes reading NTF Flashcards
Francis Galton experiment
- identical twins and studied them
- non- identical twins and studied them
Bastock’s experiment
- crosses a sex- linked yellow fruit fly mutant with wild stock fruit flies for 7 generations
- ## ensured that the wild stock was genetically similar to the yellow stock except in the region of the yellow gene
conclusion of Bastock’s experiment
- males with yellow mutant were less successful at mating with wild- type females
- males with wild type were more successful at mating with wild- type females
- the wild- type had a different courtship behaviour with smaller proportion of wing vibrations-> less ‘sexy’
Rotherbuhler experiment
- crossed:
hygienic X unhygienic= all unhygienic offspring - cross:
hygienic X unhygienic offspring= Ur, uR, ur, UR (dihybrid cross)
conclusion of Rotherbuhler’s experiment
- unhygienic (not uncapping, not removing) are dominant traits
- 2 separate genes involved
- unhygienic worker do perform hygienic activities at low frequency and require a powerful stimulus
- U and u act as switches that release uncapping behaviour
genes that act as switches
butterflies:
- wing pattern is under control of many genes
- single switch gene determines whether the pattern appears
lactose deficiency:
- L, l1, l2
- L dominant, l1 and l2 recessive
- L? digest milk, l1? can’t in adulthood, l2l2 can never
do female crickets produce sound?
no
can female crickets distinguish between the song of their own species and that of another species
yes
Hoy and Paul experiment
- Y maze and played songs from loudspeaker on either side
- different species song placed on each side
- crickets placed on maze
conclusion to Hoy and Paul experiment
species specific discrimination
conclusion of Scott and Fuller’s experiment
behavioural traits of dogs were controlled by 1 or 2 genes
Scott and Fuller’s experiment
- listed characteristics of Basenjis and cocker spaniel
- listed likely modes of inheritance
