In dogs (Canis familiaris), there is a hereditary deafness caused by the recessive gene d. A kennel owner has a male dog (Fido, of course) that she wants to use for breeding purposes. She comes to you for genetlc advice. The dog can hear, so you know that his genotype is either DD or Dd. If Fido's genotype were Dd, the owner would not use him for breeding so that the deafness gene will not be passed on. The dog's genotype can be ascertained via a test-cross with a deaf female (dd). Draw Punnett squares or pedigrees to illustrate these two possible crosses. O000 O a. Use fractions or decimals to indicate proportions: In each case, what proportion of the offspring would be expected to be hearing? b. What proportion would be expected to be deaf? c. How could you tell the genotype of the male dog (in parental generation P)? d. Also, using a Punnett square, how would you explain to the kennel owner that two hearing dogs could produce deaf offspring? Indicate to the kennel owner what kind(s) of gametes (ova or sperm) could hearing dogs produce to conceive a deaf puppy

Normal male Pikachu - straight tail Normal Female pikachu - Indented tail Abnormal Male Pikachu - Indented tail Abnormal Female Pikachu - staright tail Based on the chart explain the inheritance and the reasoning for the tails.

a. Father of Genetics; studied pea plants; made the 3 laws of genetics - 1. Heredity inheritance, dominance, and segregation 2. Traits b. A trait that's STRONGER and covers over another; CAPITOL letter 3. Dominant c. The weaker trait, that we can't see when we have the stronger allele; 4. Recessive lower case letter 5. incomplete d. A characteristic or feature of a person, something about how they look. dominance e. The offspring of 2 different plants or animals 6. Hybrid f. Passing characteristics (traits) on from generation to generation 7. Gregor Mendel (grandma →mom → you) g. When the dominate allele isn't strong enough to be completely dominant

A couple comes to you, a genetics counselor, asking for you to explain to them their risk of having a child with cystic fibrosis. Cystic fibrosis is a recessive condition that impacts the lungs and the digestive system. The man, Julian, has a brother with the condition. He was tested for the gene, and he found out that he is a carrier (Ff), and his significant other, Gabby, is also a carrier (Ff). Use this information to answer the quesitons below.   Identify the genotype of Julian. Homozygous recessive   Homozygous dominat   Heterozygous

People often say that monozygotic twins are genetically identical. Do you think that is a correct statement? Present arguments for and against this statement.

The white spotting is caused by the S gene (“S” stands for spotting), which has 2 alleles: big S (spotting) and little s (no spotting). The big S allele is dominant, so if there is at least one S allele (SS or Ss), the cat will have white spots. Calix has white spots, so he definitely has at least one big S allele. The rest of the fur color is controlled by the O gene that also has 2 alleles: big O (orange fur) and little o (black fur). The O gene is on the X chromosome. Males only have one X chromosome, so they can only have one allele for the O gene. They can either be orange (O) or black (o). Females have two X chromosomes, so they can have two alleles for the O gene. If they have two O alleles (OO), they are orange. If they have two o alleles (oo), they are black. If they have one of each allele (Oo), they have both orange and black fur.   female: XX male:XY   Which of the following fur colors are possible in males? Choose all that apply. Remember that the S gene for white spots is…

Hello Heliodors! (cont.) Trait A For Heliodors, having four arm-like extensions is dominant over having two. In a family of Heliodors, Hayden has four arm-like extensions like his mother Helen. His father, Harry, and sister, Holly both have two. What are the genotypes of everyone in this family of Heliodors? What is Hayden's genotype? O Not enough information to determine. AA (homozygous dominant) Aa (heterozygous) aa (homozygous recessive)

Construct a genetics problem to be given to a classmate. The problem must test incomplete dominance, codominance, multiple alleles, or polygenic traits. Your problem must have an answer key that includes all of your work.

A GENETICIST DISCOVERS A NEW MUTATION IN PEAS THAT CAUSES MOTTLED FLOWER COLOR. SHE CALLS THIS MUTATION SPOTTY AND DETERMINES THAT IT IS DUE TO AN AUTOSOMAL RECESSIVE ALLELE (S). SHE WANTS TO DETERMINE WHETHER THE GENE ENCODING SPOTTY IS LINKED TO THE RECESSIVE GENE FOR FLOWER COLOR (WHITE, W, IS RECESSIVE TO PURPLE). SHE CROSSES A PLANT HETEROZYGOUS FOR BOTH TRAITS WITH A PLANT HOMOZYGOUS RECESSIVE FOR BOTH TRAITS AND OBTAINED THE FOLLOWING PROGENY:NORMAL, PURPLE: 86 NORMAL, WHITE: 14 SPOTTY, PURPLE: 10 SPOTTY, WHITE: 90• WHAT ARE THE GENOTYPES FOR EACH OF THESE FOUR PROGENY TYPES?• WHICH ALLELES ARE FOUND ON EACH CHROMOSOME OF THE DOUBLE HETEROZYGOTE PARENT? (USE SLASH NOTATION.)• WHAT IS THE DISTANCE IN CM BETWEEN THESE TWO GENES?

Colour blindness is caused by a sex-linked, recessive gene. If a woman, whose father was colour blind, marries a man with normal colour vision, what percentage of their children will be colour blind? Show using a Punnet square cross