Part I A. Smooth and thick are dominant B. Smooth and thin are dominant C. Thick

Question

Part I

A. Smooth and thick are dominant

B. Smooth and thin are dominant

C. Thick and smooth are recessive

A. All plants would have hairy leaves

B. 4/16 will have thin hairy leaves

C. None will have thin hairy laves

A plant that breeds true for thick and hairy leaves is crossed with one that breeds true for thin smooth leaves. The offspring all have thin hairy leaves. What can you conclude from this cross? What would you expect if you crossed an F1 plant back to a plant that breeds true for thin hairy leaves?

Explanation / Answer

C. Thick and smooth are recessive

Explanation:

Thick=t

Thin=T

Hairy=H

Smooth=h

Thick hairy leaves (ttHH) x thin smooth leaves (TThh)

= thin hairy leaves (TtHh)

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A. All plants would have hairy leaves

thin hairy leaves (TtHh) x thin hairy leaves (TTHH)

=thin hairy leaves

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