Hermaphrodite Parent genotype Male Parent genotype X Male gametes Female gametes Progeny genotype Which progeny are you continuing with Why Progeny phenotypes and ratios Hermaphrodite ID: 252591
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Slide1
Creating a heterozygous male
Hermaphrodite Parent genotype
Male Parent genotype
X
Male gametes
Female gametes
Progeny genotype
Which progeny are you continuing with? Why?
Progeny phenotypes
and ratiosSlide2
Hermaphrodite
Parent genotype
Male Parent genotype
X
Male gametes
Female gametes
F1 Progeny genotype
and ratios
F1 Progeny phenotypes
Linkage 1: Cross with Unlinked
unc
+/+ ;
unc/uncSlide3
Linkage 2: Selfing of hermaphrodite from unlinked cross
hermaphrodite
X
self cross
gametes
Progeny genotype
Progeny phenotypes
and ratiosSlide4
Hermaphrodite
Parent genotype
Male Parent genotype
X
Male gametes
Female gametes
Progeny genotype
Progeny phenotypes
and ratios
Linkage 1: Crossing with Linked
unc
Which progeny are you continuing with? Why?
+
unc/
+
uncSlide5
Linkage 2: Selfing of hermaphrodite from linked cross
hermaphrodite
X
self cross
gametes
Progeny genotype
Progeny phenotypes
and ratiosSlide6
Mapping 1: Making the double mutant
hermaphrodite
X
self cross
gametes
Progeny genotype
Progeny phenotypes
and ratios
What if the genotype of the parent was
+
unc
/+
unc
?Slide7
Mapping 2: Making heterozygotes for mapping
Hermaphrodite Parent genotype
Male Parent genotype
X
Male gametes
Female gametes
Progeny genotype
Progeny phenotypes
and ratios
Why might you see
Dpy
Unc
progeny?Slide8
Mapping 3: Test Cross
Hermaphrodite Parent genotype
Male Parent genotype
X
Male gametes
Female gametes
Progeny genotype
Progeny phenotypes
and ratios
Parental
RecombinantSlide9
Symbols to Know for Crosses
a//a – a is the allele and // represents the chromatids – there are two for a diploid organism – sometimes written as /a b//a b – two different genes on the same chromosomea//a ; b//b – two different genes on different chromosomesX – symbolizes mating between two different individualsX - symbolizes a self cross – when the hermaphrodite worms fertilize their own eggs