What is a gene? Yourgenome.org stimulus

What is a gene?

• a small section of DNA

• a small section of a chromosome

• a small section of a base

A gene usually contains

• health, wealth and stealth

• hydrogen bonds and amino acids

• instructions for a specific molecule, usually a protein

Which answer below does this description belong to?

Contains the information required to build specific proteins needed in an organism.

• Chromosome

• DNA

• Genes

Like flavours, genes come in different forms called

• Flavour flaves

• Alleles

• Chromatids

Alleles of particular genes come in pairs, one on each chromosome

(we have 23 pairs of chromosomes)

• TRUE

• FALSE

• Not 100% true

If the alleles of a particular gene are the same, the organism is described as homozygous for that gene.

• False

• TRUE

If the alleles of a particular gene are different the organism is described as homozygous for that gene.

• HETEROzygous is TRUE

• HOMOzygous is TRUE

An organism's phenotype is

• The physical traits and characteristics of an organism resulting from their genetic makeup

• The genetic makeup of an organism resulting from their DNA

• The physical traits of an organism's parent

An individual's phenotype (physical characteristics) is due to the

• combination of alleles they have

• combination of amino acids present

For a gene that determines eye colour there may be several different alleles. One allele may result in blue eyes, while another might result in brown eyes. The final colour of the individual’s eyes will depend on:

• which chromosomes are present

• which alleles they have and how they interact.

• which foods the mother eats during pregnancy

• which nationality the father is