What proportion of black star F₂ would be true breeding? 00 O 1/6 O 1/3 O 1/2 O 2/3 O 5/6 O 100% None of these above

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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What proportion of black star F₂ would be true breeding?
0
O 1/6
O 1/3
O 1/2
O 2/3
5/6
O 100%
O None of these above
Transcribed Image Text:What proportion of black star F₂ would be true breeding? 0 O 1/6 O 1/3 O 1/2 O 2/3 5/6 O 100% O None of these above
Y-: yellow
yy: black
S-: star
ss: starless
All the sneetches want their children to have stars on their bellies. An embryo with either YYss or yySS
genotype is lethal. Y and S are two independently assorting autosomal genes. A true breeding yellow star
bellied sneetch mated with a true breeding black starless sneetch and produced 20 F₁ sneetches. The F₁ then
mated with each other and produced 420 F2 progeny.
Transcribed Image Text:Y-: yellow yy: black S-: star ss: starless All the sneetches want their children to have stars on their bellies. An embryo with either YYss or yySS genotype is lethal. Y and S are two independently assorting autosomal genes. A true breeding yellow star bellied sneetch mated with a true breeding black starless sneetch and produced 20 F₁ sneetches. The F₁ then mated with each other and produced 420 F2 progeny.
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