Which of the following crosses will produce all heterozygous offspring in the F1 generation?
Which of the following crosses will produce all heterozygous offspring in the F1 generation?
निम्नलिखित में से कौन-सा संकरण (क्रॉस) F₁ पीढ़ी में सभी विषमयुग्मजी संतान उत्पन्न करेगा?
Detailed Solution & Logic
TT × tt
Explanation
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In genetics, heterozygous means having two different alleles (Tt).
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Let’s check the crosses:
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Tt × Tt → Offspring: TT, Tt, Tt, tt → not all heterozygous
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tt × tt → Offspring: tt only → homozygous
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TT × tt → Offspring: All Tt → all heterozygous ✅
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TT × TT → Offspring: All TT → homozygous
Extra fact:
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This is an example of a monohybrid cross for a single trait.
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When you cross homozygous dominant × homozygous recessive, all F1 offspring are heterozygous.
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जेनेटिक्स में हेटेरोजाइगस (Tt) का मतलब है कि दोनों एलली अलग-अलग हों।
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क्रॉस देखें:
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Tt × Tt → संतान: TT, Tt, Tt, tt → सभी हेटेरोजाइगस नहीं
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tt × tt → संतान: tt केवल → होमोज़ाइगस
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TT × tt → संतान: सभी Tt → सभी हेटेरोजाइगस ✅
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TT × TT → संतान: सभी TT → होमोज़ाइगस
अतिरिक्त तथ्य:
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यह मोनोहाइब्रिड क्रॉस का उदाहरण है।
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जब आप होमोज़ाइगस डॉमिनेंट × होमोज़ाइगस रिसेसिव क्रॉस करते हैं, तो F1 की सभी संतान हेटेरोजाइगस होती हैं।
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