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SNPs are sites of variability in genomes.

For the ABO gene, the three alleles are the IA, IB and i alleles. The i allele (for the the “O” blood type allele) is recessive to both the IA and IB alleles (the “A” and “B” alleles).The alleles IA and IB show _______________.

For X-linked traits, the frequency of the recessive phenotype in males and females is

The most informative studies on how and to what degree heredity and the environment influence human traits have relied on data from

Dwarfism in humans is a dominant trait. Therefore, an individual who is dwarf will be homozygous.

To form identical twins, one fertilised egg (ovum) splits and develops two babies with exactly the same genetic information. This differs from fraternal twins, where two eggs (ova) are fertilised by two sperm and produce two genetically unique children, who are no more alike than individual siblings born at different times.

When a person dies due to an allele combination than it is called as lethal allele combination.

Short repeat sequences are present in the protein coding sequences in DNA.

Sometime in the 18th or 19th century, a woman who carried the allele responsible for Huntington’s moved to the area and had 10 children. Many of the current residents of Lake Maracaibo region of Venezuela are descended from her. This is an example of bottleneck effect.

Environmental factors most affect the expression of __________.