The pedigree chart below shows a possible pattern of inheritance for human albinism - HSC - SSCE Biology - Question 14 - 2003 - Paper 1

To determine which statement is correct, we analyze the statements in relation to the pattern of inheritance shown in the pedigree chart:

1. People with albinism are homozygous for albinism. This statement is generally accurate, as albinism is usually caused by a recessive allele, leading to homozygosity for the albinism gene in affected individuals.

2. The gene for normal skin pigmentation is recessive. This statement aligns with the understanding that in traits exhibiting Mendelian inheritance, the normal pigmentation trait is often dominant over albinism.

3. There are two genes that code for albinism. This statement is incorrect as albinism is primarily caused by a single gene defect affecting melanin production.

4. Albinism is a sex-linked characteristic. This statement is also incorrect, as albinism is not specifically linked to sex chromosomes but is an autosomal trait.

Based on this analysis, the correct answer is (A) People with albinism are homozygous for albinism.