Genetics Suppose that the wild type phenotype for apples is yellow, short fruit
ID: 189775 • Letter: G
Question
Genetics Suppose that the wild type phenotype for apples is yellow, short fruit with large leaves and that a strain of mutant apples has red, round fruit with small leaves. A and a represent the alleles for fruit color, B and b represent the alleles for fruit shape, and C and c the leaf shape. Two apples with the genotypes, Aa Bb cc and Aa Bb CC, are crossed. The resulting Punnett square is shown below. One square has been completed with the correct apple phenotype. Fill in the rest of the Punnett square by placing a fruit and leaf phenotype in each square.
ABc
Abc
aBc
abc
ABC
AbC
aBC
abC
What are the modes of inheritance for each trait in the mutant strain of apples?
ABc
Abc
aBc
abc
ABC
yellow, tall fruit, large leavesAbC
aBC
abC
Explanation / Answer
ABc
Abc
aBc
abc
ABC
Yellow, Short fruit , Large leaves
Yellow, Short fruit, Large leaves
Yellow, Short fruit, Large leaves
Yellow, Short fruit, Large leaves
AbC
Yellow, Short fruit, Large leaves
Yellow, Round fruit, Large leaves
Yellow, Short fruit, Large leaves
Yellow, Round fruit, Large leaves
aBC
Yellow, Short fruit, Large leaves
Yellow, Short fruit, Large leaves
Red, Short fruit, Large leaves
Red, Short, Large fruit leaves
abC
Yellow, Short fruit, Large leaves
Yellow, Round fruit, Large leaves
Red, Short fruit, Large leaves
Red, Round fruit, Large leaves
As per your question, the alleles B and b are for fruit shape which is short (for Bb and BB) and round (bb). There is no mention of tall fruits at all. However, in the punnet square, you have wtritten Bb as tall fruits. The chat that I have provided above is as per the details given in the question.
However, if the traits are BB or Bb as tall and bb as short then just replaced short with tall and round with tall in the above chart, as all the others remain the same.
The mode of inheritence are as follows:color- autosomal dominant, shape- autosomal recessive, and leaf shape- autosomal dominant.
ABc
Abc
aBc
abc
ABC
Yellow, Short fruit , Large leaves
Yellow, Short fruit, Large leaves
Yellow, Short fruit, Large leaves
Yellow, Short fruit, Large leaves
AbC
Yellow, Short fruit, Large leaves
Yellow, Round fruit, Large leaves
Yellow, Short fruit, Large leaves
Yellow, Round fruit, Large leaves
aBC
Yellow, Short fruit, Large leaves
Yellow, Short fruit, Large leaves
Red, Short fruit, Large leaves
Red, Short, Large fruit leaves
abC
Yellow, Short fruit, Large leaves
Yellow, Round fruit, Large leaves
Red, Short fruit, Large leaves
Red, Round fruit, Large leaves
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