​Given below is a pedigree indicating a pattern of inheritance:​

The following statements are drawn from the above pedigree towards understanding the pattern of inheritance:

A. An affected male does not appear to pass the trait to his sons
B. An affected male appears to pass the allele to a daughter who is unaffected
C. All affected individuals have at least one affected parent
D. The given trait appears to be a recessive one
E. The given trait appears to be an autosomal recessive one

Select the option from the following that has all correct statements:

Correct option is B

Explanation-

Circles = females
Squares = males
Filled shapes (black) = affected individuals
Empty shapes (white) = unaffected individuals

Examine the Pedigree Pattern
Affected males do not pass the trait to their sons → suggests not Y-linked
Affected females sometimes pass the trait to both sons and daughters → consistent with autosomal
Trait skips generations and unaffected parents have affected offspring → strongly suggests a recessive trait

Statement A: An affected male does not appear to pass the trait to his sons.
True — In multiple generations, affected males have unaffected sons.

Statement B: An affected male appears to pass the allele to a daughter who is unaffected.
True — Consistent with recessive inheritance (daughter can be a carrier).

Statement C: All affected individuals have at least one affected parent.
 False — In recessive traits, two unaffected carriers can produce affected children. This is visible in the pedigree (e.g., second generation on the left).

Statement D: The given trait appears to be a recessive one.
True — Trait skips generations and appears in siblings with unaffected parents.

Statement E: The given trait appears to be an autosomal recessive one.
True — It affects both males and females equally and skips generations, classic signs of autosomal recessive inheritance.

Correct statements are: A, B, D, and E

So, the appropriate option is b - A, B and D only.