Dizygotic twins are those twins that arise when two eggs get fused with different sperms. Such a kind of twins is also known as fraternal twins and they are the most occurring type of twins. These twins are not similar to each other as they share only fifty percent of the total genome. The two ova are released by the ovary at the same time and then they are fertilized by two separate sperms.
The gender of these twins might be the same or different. The physical appearance and the blood groups are also different from these twins. The rate of occurrence of dizygotic twins is variable worldwide. The central and western parts of Africa have the highest rates of the occurrence of non-identical twins. The dizygotic twinning accounts for 2/3rd of the total twin births.
How is an F′ factor different from an F factor?
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on
In fruit flies, curved wings are recessive to straight wings,
What is an advantage and a disadvantage of this repair system?
Explain the type of speciation (allopatric, parapatric, or sympatric
The raw material for evolution is random mutation. Discuss whether or
With regard to the timing of conjugation, explain why the recipient
A woman who is heterozygous, Bb, has brown eyes;
A recessive allele in mice results in an unusally long neck.
Why is an antibody used in this experiment? From
