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6) Consider the maternal effect gene that controls snail coiling where D= dextral, dominant, d=sinistral, recessive. Indicate the genotype(s) and phenotype(s) of offspring from the following crosses - females are written on the left, males on the right for each cross. Progeny Genotype(s) (Include ratio) Progeny Phenotype(s) (Include ratio) 1. Dd x Dd 2. dd x Dd 3. Dd x DD 4. Dd x dd

6) Consider the maternal effect gene that controls snail coiling where D= dextral, dominant, d=sinistral, recessive. Indicate the genotype(s) and phenotype(s) of offspring from the following crosses - females are written on the left, males on the right for each cross. Progeny Genotype(s) (Include ratio) Progeny Phenotype(s) (Include ratio) 1. Dd x Dd 2. dd x Dd 3. Dd x DD 4. Dd x dd

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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For the progeny phenotype(s), please name whether they are all sinistral or dextral. 

Certainly! Here's the transcription and explanation for the educational website: --- **Exercise 6: Snail Coiling and Maternal Effect Genes** Consider the maternal effect gene that controls snail coiling. In this context: - **D** = dextral (right-coiling), dominant - **d** = sinistral (left-coiling), recessive The task is to indicate the genotype(s) and phenotype(s) of offspring from the following genetic crosses. In each cross, females are listed on the left and males on the right. ### Crosses and Analysis: #### 1. Dd (female) x Dd (male) - **Progeny Genotype(s) (Include ratio):** - **Progeny Phenotype(s) (Include ratio):** #### 2. dd (female) x Dd (male) - **Progeny Genotype(s) (Include ratio):** - **Progeny Phenotype(s) (Include ratio):** #### 3. Dd (female) x DD (male) - **Progeny Genotype(s) (Include ratio):** - **Progeny Phenotype(s) (Include ratio):** #### 4. Dd (female) x dd (male) - **Progeny Genotype(s) (Include ratio):** - **Progeny Phenotype(s) (Include ratio):** This table is designed to help students predict the outcomes of genetic crosses based on the maternal effect of alleles. Understanding these patterns is crucial in genetics, particularly for traits influenced by the mother. #### Explanation: - **Genotype** refers to the genetic makeup (alleles) of the offspring. - **Phenotype** refers to the physical expression (dextral or sinistral) of those genotypes. Students should fill in the table by considering the dominant and recessive allele interactions and the maternal effect in influencing phenotype outcomes. ---
Transcribed Image Text:Certainly! Here's the transcription and explanation for the educational website: --- **Exercise 6: Snail Coiling and Maternal Effect Genes** Consider the maternal effect gene that controls snail coiling. In this context: - **D** = dextral (right-coiling), dominant - **d** = sinistral (left-coiling), recessive The task is to indicate the genotype(s) and phenotype(s) of offspring from the following genetic crosses. In each cross, females are listed on the left and males on the right. ### Crosses and Analysis: #### 1. Dd (female) x Dd (male) - **Progeny Genotype(s) (Include ratio):** - **Progeny Phenotype(s) (Include ratio):** #### 2. dd (female) x Dd (male) - **Progeny Genotype(s) (Include ratio):** - **Progeny Phenotype(s) (Include ratio):** #### 3. Dd (female) x DD (male) - **Progeny Genotype(s) (Include ratio):** - **Progeny Phenotype(s) (Include ratio):** #### 4. Dd (female) x dd (male) - **Progeny Genotype(s) (Include ratio):** - **Progeny Phenotype(s) (Include ratio):** This table is designed to help students predict the outcomes of genetic crosses based on the maternal effect of alleles. Understanding these patterns is crucial in genetics, particularly for traits influenced by the mother. #### Explanation: - **Genotype** refers to the genetic makeup (alleles) of the offspring. - **Phenotype** refers to the physical expression (dextral or sinistral) of those genotypes. Students should fill in the table by considering the dominant and recessive allele interactions and the maternal effect in influencing phenotype outcomes. ---
Expert Solution
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Alleles are the alternative forms of a gene that are located on the same locus of a homologous chromosome with contrasting characteristics.

In case of cytoplasmic inheritance, it is uniparental (maternal) and only depends on the genotype of mother.

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