Which statement best describes an understanding of genetics that would be missing without the work of Mendel? The DNA codes for traits would not be known. The protein codes for traits would not be known. Some alleles are dominant, and some alleles are recessive. Offspring receive two copies of each allele from each parent.

some alleles are dominent and some are reccessive

The statement that best illustrates an understanding of genetics, which would be missing without the work of Mendel is that some of the alleles are dominant, and some alleles are recessive.

The terms recessive and dominant illustrates the patterns of inheritance of certain traits. For a recessive allele to generate a recessive phenotype, the individual must exhibit two copies, that is, one from each parent. On the other hand, an individual with one dominant and one recessive allele for a gene will exhibit the dominant phenotype.

The law of dominance given by Mendel illustrates that the recessive alleles will always be masked by the dominant alleles. Thus, a cross between a homozygous recessive and homozygous dominant will always articulate the dominant phenotype, while still exhibiting a heterozygous genotype.