Given that there is a trait determined by the alleles A and a, where A is dominant, i.e., the presence of A determines the phenotype.  Assume that two parents have four children, and assume that nothing is known about the parents.  One of the four children shows the recessive condition (so its genotype is aa) and the other three show the dominant trait (so their genotype is either Aa or AA).   What can we conclude about the parents? Group of answer choices - at least one parent shows the dominant trait - Both parents are heterozygous - Both parents have at least one recessive allele

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.