In which of the following ways does a fertilized egg differ from an unfertilized egg? A) A fertilized egg has more unpaired chro
mosomes than an unfertilized egg. B) A fertilized egg has chromosomes that will soon go through meiosis while an unfertilized egg's chromosomes have already divided. C) A fertilized egg has fewer chromosome mutations than an unfertilized egg. D) A fertilized egg has chromosomes from two parents while an unfertilized egg only has chromosomes from the mother.
Answer - D Gametes always have half the number of chromosomes compared to the somatic cells, hence an unfertilized egg would have half the chromosomes from the mother, and a fertilized egg will contain diploid number of chromosomes. Half of them from inherited from each of the two parents.
The fertilized egg has 46 chromosomes since it is fertilized by the sperm which makes 23 + 23= 46 so, it is fertilized by both parents. HINT: The sperm is produced in the uterus by the father. An unfertilized egg has 23 chromosomes since it is not fertilized by it's father. Therefore, it is only fertilized by it's mother since the mother produces the egg through the ovaries.
The best way to determine if these populations form part of the same species is to study the existence of reproductive isolation between populations. Moreover, the result of an experiment based on the study of reproductive barriers may be complemented with molecular biology approaches that determine the level of sequence homology between populations
