A recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads that are non-viable. You have been instructed to identity females that are homozygous for the ichabod mutant allele. At your disposal are a tank of wild-type fish (males and females), a tank of male and female parental fish that are all heterozygous for the ichabod mutant allele (ichabodi+), and a tank of F1 fish derived from a cross between a heterazygous male and heterazygous female (ichabodl+) Which of the following would be a way to identify females that are homozygous mutant, ie ichobodlichabod? Select all answers that would work . Cross F1 females to F1 males and observe their offspring Crosses that produce headless offspring came from a homozygous female. Cross F1 males to females from the parental tank and observe their offspring 25% of these crosses should produce headless offspring O b. Cross E1 females to F1 males to make the F2 generation Cross F2 females to F2 males and observe their offspring Crosses that produce headless offspring came from a homozygous female Cross F1 females to wild-type males and observe their offspring Crosses that produce headless offspning came from a homozygous female Od. This experiment is not possible because homozygous females are not viable De.
A recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads that are non-viable. You have been instructed to identity females that are homozygous for the ichabod mutant allele. At your disposal are a tank of wild-type fish (males and females), a tank of male and female parental fish that are all heterozygous for the ichabod mutant allele (ichabodi+), and a tank of F1 fish derived from a cross between a heterazygous male and heterazygous female (ichabodl+) Which of the following would be a way to identify females that are homozygous mutant, ie ichobodlichabod? Select all answers that would work . Cross F1 females to F1 males and observe their offspring Crosses that produce headless offspring came from a homozygous female. Cross F1 males to females from the parental tank and observe their offspring 25% of these crosses should produce headless offspring O b. Cross E1 females to F1 males to make the F2 generation Cross F2 females to F2 males and observe their offspring Crosses that produce headless offspring came from a homozygous female Cross F1 females to wild-type males and observe their offspring Crosses that produce headless offspning came from a homozygous female Od. This experiment is not possible because homozygous females are not viable De.
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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Transcribed Image Text:A recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads that are non-viable. You have been instructed to identify females that are homozygous for the ichabod mutant allele. At your disposal are a tank of wild-type fish (males
and females), a tank of male and female parental fish that are all heterozygous for the ichabod mutant allele (ichabodl+), and a tank of F1 fish derived from a cross between a heterozygous male and heterozygous female (ichabodl+). Which of the following would be a
way to identify females that are homozygous mutant, i.e. ichabodlichabod? Select all answers that would work.
Cross F1 females to F1 males and observe their offspring. Crosses that produce headless offspring came from a homozygous female.
a.
Cross F1 males to females from the parental tank and observe their offspring. 25% of these crosses should produce headless offspring.
b.
Cross F1 females to F1 males to make the F2 generation. Cross F2 females to F2 males and observe their offspring. Crosses that produce headless offspring came from a homozvgous female
C.
Cross F1 females to wild-type males and observe their offspring. Crosses that produce headless offspring came from a homozygous female.
d.
This experiment is not possible because homozygous females are not viable.
e.
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The correct answer is option C.
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