In sexual reproduction, the genetic material of two individuals is combined to produce genetically diverse offspring that differ from their parents. Fertilization and meiosis alternate in sexual life cycles. What happens between these two events depends upon the organism. The process of meiosis, the division of the contents of the nucleus that divides the chromosomes among gametes, reduces the chromosome number by half, while fertilization, the joining of two haploid gametes, restores the diploid condition. There are three main categories of life cycles in eukaryotic organisms: diploid-dominant, haploid-dominant, and alternation of generations
Answer:
Cercopithecoids have a narrow nose and palate, and smaller brains relative to body size than Hominoids
Klinefelter syndrome is when there are 2 or more X chromosomes.
The similarity of 94% in their DNA sequence suggest that they have originated from a common ancestor and are closely related species.
Explanation:
The difference in DNA sequences in different species is due to the accumulation of genetic variation in the course of natural selection and evolution. Less is the difference in DNA sequences of two organisms the more related they are.
Genes determine the characteristics in an organism, and they are DNA sequences determining the protein to be formed. The similarity in DNA sequence of two species establish the evolutionary relationship among them.
Due to the genetic variation in species, the natural selection of the species had caused the evolution of the species adapted well to the environment.
Answer:
Rickettsia
Explanation:
Rickettsia are usually considered as a separate group of bacteria. These microorganisms which multiply by binary fission inside their host cells are a group of obligately intracellular gram-negative mircoorganisms, having cell walls that look exactly as that of a typical bacteria cell wall. They possess no flagella. They are carried as parasites such as lice and tcks, and also cause diseases such as typhus.
