Question

Select the statement(s) that accurately describes the genotype of the mother labeled "?" in the F1 generation in the pedigree chart shown.
Genotypes and Phenotypes (Exceeding) - Screen 6.Question 1.1

The mother does not have the condition or express the trait.

The mother's genotype could be 'bb.'

The mother has at least one dominant allele.

The mother is recessive for the trait.

The mother's genotype can be 'BB' or 'Bb

Answer 1

I don't have the pedigree image, so I can't pick the correct statements for that specific family. Please upload the chart or describe who is affected/unaffected in each generation (especially the parents and any affected children).

Meanwhile, here are the rules you can use to decide which statements are true:

- If the trait is autosomal dominant
- Unaffected individuals are homozygous recessive (bb).
- An unaffected mother therefore must be bb (so "mother could be 'bb'" and "mother is recessive for the trait" would be true). She cannot be BB or Bb.

- If the trait is autosomal recessive
- Affected individuals are bb; unaffected individuals can be BB or Bb.
- If the mother is unaffected and has no affected children and no affected partner, her genotype could be BB or Bb (so "mother's genotype can be 'BB' or 'Bb'" could be true).
- If the mother is unaffected but produces an affected child with an affected partner (or with a known carrier), she must be a carrier (Bb). In that case:
- "The mother does not have the condition" — true.
- "The mother's genotype could be 'bb'" — false.
- "The mother has at least one dominant allele" — true (Bb).
- "The mother is recessive for the trait" — false.
- "The mother's genotype can be 'BB' or 'Bb'" — false (only Bb).

Send the pedigree or the phenotypes of the parents and children and I will mark which statements are correct for that pedigree.