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In which mode of inheritance do you expe...

In which mode of inheritance do you expect more maternal influence among the of spring

A

Autosomal

B

Cytoplasmic

C

Y-linked

D

X-linked

Text Solution

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The correct Answer is:
To answer the question regarding the mode of inheritance that exhibits more maternal influence among the offspring, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Modes of Inheritance**: - There are various modes of inheritance including autosomal, cytoplasmic, X-linked, and Y-linked inheritance. Each mode has different implications for how traits are passed from parents to offspring. 2. **Identifying Maternal Influence**: - Maternal influence refers to the genetic contributions made by the mother to her offspring. This is particularly significant in modes of inheritance where the mother’s genetic material plays a crucial role. 3. **Analyzing Cytoplasmic Inheritance**: - Cytoplasmic inheritance is a mode where genes are inherited through cytoplasmic organelles, primarily mitochondria and chloroplasts. These organelles contain their own DNA (mtDNA for mitochondria and ctDNA for chloroplasts) and are passed down from the mother to the offspring. 4. **Explaining the Role of Mitochondria and Chloroplasts**: - Mitochondria and chloroplasts are semi-autonomous organelles that replicate independently of the nuclear DNA. The genes in these organelles are responsible for certain traits and are exclusively inherited from the mother, leading to a strong maternal influence. 5. **Comparing with Other Modes of Inheritance**: - In X-linked inheritance, traits are passed through genes located on the X chromosome, which can involve both maternal and paternal contributions but is not exclusively maternal. - Autosomal inheritance involves genes located on autosomes (non-sex chromosomes) and can come from both parents equally. - Y-linked inheritance involves genes on the Y chromosome and is only passed from father to son, thus having no maternal influence. 6. **Conclusion**: - Based on the analysis, the mode of inheritance that exhibits the most maternal influence among the offspring is **cytoplasmic inheritance**. ### Final Answer: The mode of inheritance in which you expect more maternal influence among the offspring is **cytoplasmic inheritance**.
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