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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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ronswanson11 ronswanson11
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6 years ago
Describe the three types of tetrads that can be formed when a diploid yeast sporulates to form haploid gametes.
 
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6 years ago
Parental ditypes (PD) contain four haploid cells with the same alleles seen in the parental class.
Nonparental ditypes (NPD) contain four recombinant haploid cells because the two parental alleles have recombined to form a nonparental combination of alleles.
Tetratype tetrads (TT) contain four different kinds of haploid cells: two parental spores and two recombinant spores. When two genes are not linked, tetratypes arise when a crossover occurs between one of the two genes and its centromere.
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