Epigenetics and Pedigrees

Proportionate heritability is

• Phenotype= genetics + environment

• Genetics = phenotype + environment

• environment + phenotype = genetics

• Genetics + phenotype = environment

This rabbit has black fur patches because

• when cold the enzyme tyrosinase becomes inactive and produces melanin

• when cold the enzyme tyrosinase becomes active and produces melanin

• its born this way

• when hot the enzyme tyrosinase becomes inactive and allows the production of melanin

Epigenetics is

• a change in the DNA sequence

• a change in the histone protein shape

• addition of methyl groups to DNA only

• addition of methyl groups to DNA and histone proteins

Gene expression is

• transcription then translation and building a protein

• translation then transcription and making carbohydrate

• transpiration then transcription and building proteins

• proteins making changes to DNA

DNA methylation is

• adding CH₄ groups to DNA

• adding CH₃ groups to DNA phosphate groups

• adding CH₃ groups to pentose sugar in DNA

• adding CH₃ groups to DNA nucleotide bases

Histone modification is

• histone methyltransferases join methyl groups to histone protein heads

• histone methyltransferases join methyl groups to histone protein tails

• DNA methyltransferases join methyl groups to DNA phosphate groups

• DNA methyltransferases join methyl groups to DNA hydrogen bonds

Epigenetic changes are said to be

• somatically heritable

• autosomally heritable

• x linked heritable

• y linked heritable

In a pedigree chart this symbol indicates

• identical male twins

• non-identical male twins

• identical female twins

• non-identical female twins

In a pedigree chart the symbol indicates

• identical male twins

• identical female twins

• non-identical male twins

• non-identical female twins

This pedigree shows

• Autosomal dominant

• Autosomal recessive

• X linked dominant

• X linked recessive

• Y linked