OBJECTIVE LIFE SCIENCE
DEVELOPMENTAL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If Class B gene is mutated, the plant produce only
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Sepal and Carpel
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Sepal and Sepal
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Carpel and Steman
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Steman and sepal
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Explanation:
Detailed explanation-1: -Mutations in type A genes – These mutations affect the calyx and corolla, which are the outermost verticils. In these mutants, such as APETALA2 in A. thaliana, carpels develop instead of sepals and stamen in place of petals.
Detailed explanation-2: -Class B Homeotic Genes. Arabidopsis class B homeotic genes include AP3 and PISTILLATA (PI) that are required for petal and stamen identities.
Detailed explanation-3: -The AGAMOUS subfamily is named after its founding member gene, Arabidopsis AGAMOUS (AtAG). AtAG, as a C-class gene, is the master regulator of stamen and carpel formation (Bowman et al., 1989, 1991; Yanofsky et al., 1990; Lohmann and Weigel, 2002).
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