Question: ring Enabled: Final Exam 8 There are two main types of pencils: mechanical and traditional. mechanical pencils can have single, double, or triple - thickness

ring Enabled: Final Exam
8
There are two main types of pencils: mechanical and traditional. mechanical pencils can have single, double, or triple-thickness finger pads.
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traditional pencils do not have tinger pads?
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Two traditional pencils only ever have traditional offspring.
Two mechanical pencils of any devel of finger pad thickness can occasionally have traditional pencil offspring. When two pencils with single-thickness,finger pads produce mechanical offspring, they always have single-thickness finger pads. When two pencils with triple-thickness finger pads produce mechanical offspring, they always have triple-thickness finger pads. When two pencils with double-thickness finger pads produce mechanical offspring, they have double-thickness finger pads 50% of the time, singlethickness finger pads 25% of the time, and triple-thickness finger pads 25% of the time.
thickness of finger pad appears to be determined by the W gene. whether a pencil is mechanical or traditional appears to be determined by the B gene.
Pencils that are traditional express a non-functional allele of the B gene, which suppresses any form of expression of the W gene.
Interestingly, pencils with non-functional B alleles have a number of other traits associated with the lack of mechanization, including being yellow and being made of wood.
For all questions about these traits, assume there are no de novo (new) mutations appearing between generations.
Question:
There is a family of pencils with 8 offspring where:
4 of the offspring are traditional
2 have double-thickness finger pads
1 has a triple-thickness finger pad
1 has a single-thickness finger pad
Based on this, the likely genotypes of the parents are:
ring Enabled: Final Exam 8 There are two main

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