Answer:
D) fertilization
Explanation:
Fertilization is the name given to the fusion of male and female gametes. By themselves, female egg cells -- called ova -- and male sperm cells cannot grow and divide. However, once a sperm cell breaks through the egg cell membrane, the genetic material combines and the new organism begins to grow and develop as a living thing.
Sandstone. i remember learning this in 4th grade! if you were to look it up on the internet, you would find it just as easily as i did
Uracil is readily produced by the chemical degradation of cytosine so have thymine as the normal base makes detection and repair of appearing mutations more efficient
Answer:
C. Look at the Y chromosome because it is paternally inherited.
Explanation:
According to the given information, mitochondrial DNA study reveals that Neanderthals did not impart any genetic sequences in modern humans but the study of the whole genome contradicts it.
Mitochondrial DNA is maternally inherited, if whole-genome studies show the input of genetic sequences from Neanderthals in modern humans, the male Neanderthals might have shared some sequences with modern humans. In human, the Y chromosome is inherited from father to son.
So, if only male Neanderthals share common genes with modern humans, the study of genes present on the Y chromosome could reflect the sequence homology between the two. If there is no sequence homology between them for the genes of Y chromosomes, the hypothesis that male Neanderthals have imparted gene sequences in modern humans should be rejected.