Genes Genes Instructions for an inherited trait a

Genes: Genes Instructions for an inherited trait a characteristic that an organism can pass on to its offspring for each gene there are 2 alleles: alleles one from each parent DOMINANT shown as capital letters may be an organism with DOMINANT allele receives DOMINANT trait: RR, Rr recessive shown as lowercase letters an organism can have recessive trait only if it gets a recessive allele from each parent: rr When an organism has 2 DOMINANT alleles (RR) or 2 recessive alleles (rr) is called Homozygous Homo: means “the same” RR : Pure Dominant rr: Pure recessive

When an organism has 1 DOMINANT allele (R) and 1 recessive allele (r) is called Heterozygous Hetero: means “different” Rr : Hybrid Any combination of alleles (RR, Rr or rr) an organism gets from its parents is called a Genotype and the visual characteristics of a trait (what you can see, for example color) is an organism's Phenotype For example: Flower color: Genotype Phenotype Purple (P) PP Purple White (p) Pp Purple pp White From those genotypes: PP: Pure dominant trait – Homozygous Pp: Hybrid – Heterozygous pp: Pure recessive trait - Homozygous

Heterozygous (He) or Homozygous (Ho)? 1. TT 2. Pp 3. dd 4. Ff 5. Tt 6. FF 7. Mm Ho He He Ho He Which of the genotypes above would be consider purebred? TT, dd, FF

Heterocigoto (He) o Homocigoto (Ho)? 1. TT 2. Pp 3. dd 4. Ff 5. Tt 6. FF 7. Mm Ho He He Ho He Cuál de estos genotipos es considerado de raza pura? TT, dd, FF

The following Punnett square shows a cross between a mouse with a pure DOMINANT trait of a grey coat (GG) and a mouse with a pure recessive trait of a white coat (gg); the offspring is all Hybrid (Gg). G G What color are all of the offspring mice? Grey g g Gg Gg Fill in a Punnett square showing the cross between 2 hybrid mice.

El siguiente cuadro de Punnet muestra un cruce entre un ratón con un rasgo puro dominante de pelo gris (GG) y un ratón con un rasgo puro recesivo de pelo blanco (gg); la descendencia es toda híbrida (Gg). G G De que color son todos los descendientes? Gris g g Gg Gg Llena un cuadro Punnet mostrando el cruce entre dos ratones híbridos.

G G g GG Gg gg How many of every 4 baby mice are likely to have the pure dominant trait? How many are likely to have pure recessive trait? How many are likely to be hybrid? How many are likely to be grey? How many are likely to be white?

G G g GG Gg gg Cuántos ratones bebes tienen el rasgo puro dominante? Cuántos tienen el rasgo puro recesivo? Cuántos son híbridos? Cuántos son grises? Cuántos son blancos?

Sponge. Bob is known for his big round eyes which is DOMINANT over an oval eye shape. If he is heterozygous for his round eye shape and marries a woman with oval eye shape, what type of eyes might the kids have? 1. Assign a letter: Round eye (R )(Dominant) Oval eye (r ) (recessive) 2. List the genotype for each heterozygous round eye : Rr Oval eye : rr 3. Complete a Punnett square

Sponge. Bob es conocido por sus grandes y redondeados ojos, lo cual es DOMINANTE sobre la forma ovalada. Si el es heterocigoto para sus redondeados ojos y se casa con alguien con ojos ovalados cuál es la forma de los ojos que los bebes tendrán? 1. Asigna una letra: Ojo ovalado( r ) (recesivo) ojo redondo(R )(Dominante) 2. Escribe los genotipos para cada uno heterocigoto ojo redondeado: Rr Ojo ovalado: rr 3. Completa el cuadro Punnett

R r r Rr Rr r rr rr What are the possible genotypes? Rr rr What are the possible phenotypes? Round eye Oval eye What are the probabilities of a child with a round eye shape? 50% half of the offspring has the allele R What are the probabilities of a child with a oval eye shape? 50% half of the offspring has the recessive trait rr

R r r Cuales son los genotipos? Cuales son los fenotipos Rr Rr r rr rr Rr rr Ojo redondo Ojo ovalado What are the probabilities of a child with a round eye shape? 50% half of the offspring has the allele R What are the probabilities of a child with a oval eye shape? 50% half of the offspring has the recessive trait rr