Need help, please.What are the ratios for the progeny phenotype(s)? **Explanation of Maternal Effect Genes in Snail Coiling**This educational resource explores the concept of maternal effect genes, specifically focusing on snail shell coiling. The gene in discussion determines the direction of coiling: dextral (right-coiling) or sinistral (left-coiling). **Genetic Notations:**- **D** = Dextral, dominant allele- **d** = Sinistral, recessive alleleThe crosses are analyzed by determining the genotypes and phenotypes of offspring based on the genetic alleles of the females (on the left) and males (on the right).**Crosses and Predictions:**1. **Dd (female) x Dd (male):** - Progeny Genotype Options: DD, Dd, dd - Phenotype: All offspring will exhibit the dextral phenotype due to maternal inheritance patterns since the mother has at least one D allele.2. **dd (female) x Dd (male):** - Progeny Genotype Options: Dd, dd - Phenotype: All offspring will exhibit the sinistral phenotype because the maternal genotype is dd. 3. **Dd (female) x DD (male):** - Progeny Genotype Options: DD, Dd - Phenotype: All offspring will exhibit the dextral phenotype, as the mother carries the dominant D allele.4. **Dd (female) x dd (male):** - Progeny Genotype Options: Dd, dd - Phenotype: All offspring will exhibit the dextral phenotype due to the influence of the maternal D allele.**Conclusion:**The direction of coiling in snails is determined by maternal effect, with the phenotype of the offspring depending on the mother's genotype. The table serves to illustrate the outcomes of various genetic crosses.

Name: Need help, please.What are the ratios for the progeny phenotype(s)? **
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: Need help, please.What are the ratios for the progeny phenotype(s)? **Explanation of Maternal Effect Genes in Snail Coiling**This educational resource explores the concept of maternal effect genes, specifically focusing on snail shell coiling. The ge