Final answer:
Pseudo dominance occurs when the deletion of a dominant allele results in the expression of a recessive allele, which is true. It is different from the typical dominance patterns described by Mendel's Law of Dominance.
Step-by-step explanation:
The statement suggesting that pseudo dominance is caused by the deletion of dominant genes so that recessive alleles on homologous chromosomes are expressed is True. Pseudo dominance can occur when the deletion of a dominant allele in a homozygous organism results in the expression of a recessive allele that would otherwise remain unexpressed.
However, this scenario differs from typical dominance patterns where a dominant allele masks the expression of a recessive allele in a heterozygous organism. In Mendelian genetics, the Law of Dominance states that in a heterozygote, only the dominant allele is expressed, and the recessive allele is only observed in homozygous recessive individuals. Pseudo dominance is a rare instance which might be observed when a dominant allele is lost due to deletion.