Answer:
In autosomal recessive trait two alleles of the abnormal gene are required to cause the disease. So if the gene is present in the heterozygous conditions in the offspring the offspring would be disease-free but would be disease carrier.
The characteristic that is seen in the pedigree analysis of autosomal recessive diseases are.
They affect both males and females in equal frequency.
They can skin generation.
When both parents are heterozygous for the disease than one-fourth offspring would be affected.
Unaffected parents can produce affected offspring.