QuestionJuly 8, 2025

Which of the following offspring have recombinant gene types for YyRr and yyrr parents? yyRr YyRr yyrr YYRR

Which of the following offspring have recombinant gene types for YyRr and yyrr parents? yyRr YyRr yyrr YYRR
Which of the following offspring have recombinant gene types for YyRr and yyrr parents? yyRr YyRr yyrr YYRR

Solution
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Answer

yyRr Explanation 1. Identify Parental Genotypes The parental genotypes are YyRr and yyrr. 2. Determine Possible Gametes YyRr can produce gametes: Yr, yR, YR, yr. yyrr can only produce yr. 3. Identify Recombinant Offspring Recombinant offspring have new combinations of alleles not found in the parents. Cross the gametes: - Yr \times yr = Yyrr - yR \times yr = yyRr - YR \times yr = YyRr - yr \times yr = yyrr 4. Select Recombinant Types Recombinant types differ from both parents' combinations (YyRr and yyrr): - yyRr is recombinant. - Yyrr is recombinant.

Explanation

1. Identify Parental Genotypes<br /> The parental genotypes are $YyRr$ and $yyrr$.<br /><br />2. Determine Possible Gametes<br /> $YyRr$ can produce gametes: $Yr$, $yR$, $YR$, $yr$. <br /> $yyrr$ can only produce $yr$.<br /><br />3. Identify Recombinant Offspring<br /> Recombinant offspring have new combinations of alleles not found in the parents. Cross the gametes:<br />- $Yr \times yr = Yyrr$<br />- $yR \times yr = yyRr$<br />- $YR \times yr = YyRr$<br />- $yr \times yr = yyrr$<br /><br />4. Select Recombinant Types<br /> Recombinant types differ from both parents' combinations ($YyRr$ and $yyrr$):<br />- $yyRr$ is recombinant.<br />- $Yyrr$ is recombinant.
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