Kavya Certified Tutor. Aneuploidy typically refers to monosomy one chromosome copy or trisomy three chromosome copiesand arises due to nondisjunction during meiosis and gametogenesis. Possible Answers: Inheritance of the father's Y-chromosome.
Possible Answers: X-linked dominant. Chromosomal abnormalities arise in many different ways, some of which can be traced to rare errors in natural cellular processes such as DNA replication. Explanation : We know that red eyes are the dominant allele, which means white eyes are the recessive allele.
During embryogenesis the gonads will develop into either ovaries or testes. Structural defects affect only part of a chromosome a subset of genes , and so tend to be less harmful than aneuploidy. We can also conclude that the affected father is heterozygous.
Like, the chromosomes 17 has the gene SOX9, that activates TDF transcription factor, this is essential in determining the male sex as this factor is encoded by the SRY gene found on the Y chromosome. The female in the second generation is affected, even though her mother is not, meaning she must be heterozygous.