StarterDefine the following terms1. Gene2. Allele3. Gametes4. Mutation5. Mitosis6. Meiosis

White Fur

Black Fur

Sex Determination

X = Female ChromosomeY = Male Chromosome

EGG SPERM ZYGOTE

X X XX = Girl

X Y XY = Boy

Dominant Allele vs. Recessive AlleleSome alleles can be dominant (they will always show up) and some are recessive (these will only show up if both alleles are the same)Example: B = black fur, b = white fur

Genotype PhenotypeBB black furBb black furbb white fur

Genotype = the combination of alleles that an organism has

Phenotype = the characteristic produced by the genotype

Homozygous = having two identical alleles (e.g. HH, hh, BB, bb, KK, kk)

Heterozygous = having two different alleles (e.g. Hh, Bb, Kk)

Tongue Rolling Allele RNon Tongue Rolling Allele r

Q1. Julie’s GENOTYPE is ‘RR’. What is her PHENOTYPE?

Q2. Jenny’s GENOTYPE is ‘Rr’. What is her PHENOTYPE?

Q3. Kyle is not a tongue roller. What is his GENOTYPE?

Q4. Whose GENOTYPE is heterozygous?

a) Julie b) Jenny c) Kyle

Q5. Whose GENOTYPE is homozygous?

a) Julie b) Jenny c) Kyle