Question

afor questions 1-9, use the pedigree chart shown below. some of the labels may be used more than once.use a,b,c, or d for 1-6dominant pedigree1. a male2. a female3. a marriage4. a person who expresses the trait5. a person who does not express the trait6. a connection between parents and offspring7. how many generations are shown on this chart?assuming the chart above is tracing the dominant trait of \white forelock (f)\ through the family. f is a tuft of white hair on the forehead.8. what is the most likely genotype of individual \a\? (ff, ff or ff?)9. what is the most likely genotype of individual \c\? (ff, ff or ff?)ba typical pedigree for a family that carries falconi anemia. note that carriers are not indicated with half-colored shapes in this chart.recessive pedigreeanalysis questions.to answer questions #1-5, use the letter \f\ to indicate the recessive falconi anemia allele, and the letter \f\ for the normal allele.1. what is arlenes genotype?2. what is georges genotype?3. what are ann & michaels genotypes?4. most likely, sandras genotype is5. list three people from the chart (other than george) who are most likely carriers of falconi anemia.

Explanation:

Section A

Step1: Match symbols to terms

1. Male: Square shapes (C, D, etc.)
2. Female: Circle shapes (A, etc.)
3. Marriage: Horizontal line between partners
4. Express trait: Filled shapes (A, filled squares/circles)
5. No trait: Empty shapes (C, empty squares/circles)
6. Parent-offspring link: Vertical line

Step2: Count generations

Top = Gen1, Middle = Gen2, Bottom = Gen3

Step3: Genotype for dominant trait (A)

A expresses dominant trait; if A had FF, all offspring would express trait, but some don't. So A is Ff.

Step4: Genotype for non-expressing (C)

C does not show dominant trait, so must be ff (recessive homozygous).

1. Arlene has Falconi anemia (recessive trait), so she must have two recessive alleles.
2. George does not have the trait, but he has a child (Tom) with the trait, so he must carry one recessive allele.
3. Ann and Michael do not have the trait, but their child Carla has the recessive trait, so both must be carriers.
4. Sandra does not have the trait, but her child Daniel is a carrier, and her partner Tom has the trait, so she is most likely homozygous normal.
5. Carriers are individuals who do not have the trait but can pass on the recessive allele, identified by having affected offspring or being the child of an affected individual.

Answer:

1. C (or any square symbol)
2. A (or any circle symbol)
3. The horizontal line connecting A and C
4. A (or any filled shape)
5. C (or any empty shape)
6. The vertical line between parents and offspring
7. 3
8. Ff
9. ff

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Section B