Genetics length of claws size are examples of

Genetics

length of claws size are examples of eye color traits fur color

Gregor Mendel (1822 -1884) is the father of genetics.

Traits are controlled by genes. gene for brown hair gene for black hair Genes are passed from parent to offspring.

These are examples of alleles Blonde hair Brown hair Red hair Black hair

Each trait is controlled by two alleles , one from each parent. These alleles are located on homologous chromosomes allele for brown hair allele for blonde hair maternal paternal

Alleles may be dominate or recessive. TRAITS DOMINANT RECESSIVE Flower color purple white Pea color yellow green Pea shape round wrinkled Pod color green yellow Plant height tall short

What type of alleles are t, b, r, g recessive What type of alleles are T, B, R, G dominant

An organism is homozygous for a trait. red RR white rr

An organism is heterozygous for a trait. red white Rr

Is the organism homozygous or heterozygous? Aa ss Bb tt

genotype = genes geno The set of alleles such as Tt RR Ss Hh Bb

phenotype = physical appearance ph ph Long wings Curly hair Red flower Brown eyes freckles

INCOMPLETE DOMINANCE ---- has a blending affect. red white X pink

CODOMINANCE both alleles are separately expressed. white flower red flower X red & white flower

Examples of polygenic traits in humans include: skin color eye color hair color height Polygenic traits are traits produced by two or more genes.

dominant recessive

homozygous heterozygous homozygous

genotypes

phenotypes Gray fur brown fur

Heterozygous Purple X Homozygous White Homozygous white P p p Pp Pp p pp pp Heterozygous purple

Red flower X white flower pink flower A red flower is crossed with a white flower R R White flower W RW RW Red flower The offspring are pink