Genotype: Is the letters we use to represent the trait on the chromosome (Examples: TT, Tt, tt) Phenotype: Ist he trait or characteristic we 'see (Examples: Tall, Short) Homozygous Dominant: Genotype is dominant from both parent chromosomes/alleles (Example TT) Phenotype is the dominant allele = also known as purebred Homozygous Recessive: Genotype is recessive from both parent chromosomes/alleles (Example tt) Phenotype is the recessive allele = also known as purebred Heterozygous: Genotype is different--One is dominant allele and one is recessive allele (example (Tt)--Phenotype is always of dominant allele = also known as hybrid. R = round r= wrinkled T = tall + = short Y = yellow peas y = green peas P = purple flowers p = white flowers IN PEAS: %3D MAKING MONOHYBRID CROSSES: What is the genotype of a HOMOZYGOUS YELLOW SEED plant? = What is the genotype of A HOMÓZYGOUS GREEN SEED plant? = What is the genotype of a HETEROZYGOUS YELLOW plant? = Using the Punnet Square above, make a cross between a PURE YELLOW SEED parent and a PURE GREEN SEED parent. POSSIBLE OFF SPRING GENOTYPE PHENOTYPE

Use the following figure to answer the question. Shaded crossed symbols indicate affected individuals who have passed away. ||| 000 0 OTP 2 1 2 1 3 ? 4 2 O-9 3 4 5 6 Tay Sach's is and aggressive recessive disease, with high mortality during infancy. A husband and wife (unrelated) each had an uncle that died from Tay Sach's disease. They go see a genetic counselor to find out if they are at risk for having a child with Tay Sachs. What is the probability for the Husband (blue arrow) being a carrier? 1/4 1/2 1/3 2/3

People with  recessive disorders are usually born to normal parents who are both heterozygotes which means that both parents are carriers of the dominant allele for the disorder but appear normal themselves. Select one: True False

For each phenotype, list the genotypes (remember to use the letter of the dominant trait). Straight hair is dominant to curly straight curly Pointed heads are dominant to round heads pointed round Long tails are dominant over short tails Long hair is dominant over short hair long tail short tail long hair short hair

Male-pattern baldness is sex-linked and recessive. A carrier female has a child with a normal male. Give the genotype and  phenotype ratios for their offspring.

Assume for a moment that a child has a autosomal recessive disorder, but both parents appear normal. What is the genotype of both parents? : one parent must be homozygous dominant : both parents must be homozygous recessive : both parents are heterozygous : both parents nust be homozygous dominant

if your phenotype is for a dominant trait, such as curly hair, then your genotype is? a: also for curly hairb: for both curly and straight hair c: a complex combination of all hair typesd: unknown, the alleles could be heterozygous or homozygous

Incomplete penetrance can make autosomal dominant traits skip generations within a family tree. True or False.

In humans, having facial dimples is dominant to not having facial dimples. Mary has dimples, yet only 3 of her 10 children have dimples.  What must Mary's genotype be?     homozygous dominant     heterozygous     homozygous recessive     has dimples     does not have dimples

Parent one's genotype for a trait is Bb Parent two's genotype for a trait is Bb. What are the possible gametes for both parents. Example: Parent one's gametes can be: Parent two's gametes can be: