when bred together produced 12 hearting puppies and 4 deaf puppies. What are the genotypes of all the dogs? Parents’ genotype(s)? Hearing puppies’ genotypes (multiple answers)? Deaf puppies genotype(s)? Of the hearing puppies only, how many are expected to be homozygous for this trait (use a Punnett Square to solve).

You possess two alleles for each of your genes. (One from the paternal side and one from the maternal side in each homologous pair of chromosomes.) In simple inheritance, having at least one dominant allele (form of the gene) means you will display the dominant phenotype, and the only way to display the recessive phenotype is to have two recessive alleles. For example, individuals with the genotypes RR and Rr can roll their tongue (into a U shape). If you cannot roll your tongue, then you know with certaintly you have the genotype rr. If you can roll your, you would write your genotype as R- (R followed by a dash since you might not know if you are RR or Rr, but either way, you display the dominant phenotype because the first letter is capital.) Match the following traits with their proper genotype using the letters provided in the lab handout. left arm on top when crossing arms blue eyes no middigital hair widow's peak

Albinism is a recessive trait in humans. A geneticist studies a series of families in which both parents are normal and at least one child has albinism. The geneticist reasons that both parents in these families must be heterozygotes and that albinism should appear in 1/4 of the children of these families. To his surprise, the geneticist finds that the frequency of albinism among the children of these families is considerably greater than 1/4. Can you think of an explanation for the higher than-expected frequency of  albinism among these families ?

In humans, there is a gene that influences the ability to smell the thioesters present in urine after asparagus is eaten. The ability to smell these compounds is an autosomal dominant trait. A is dominant and confers the ability to smell these thioesters a is recessive and does NOT confer the ability to smell these thioesters p = freq (A) = frequency of allele A in the population = number of A alleles/ total number of alleles %3D q = freq (a) = frequency of allele a in the population where p + q = 1 and, therefore, p? + 2pq + q? = 1 and %3D %D p? = freq (AA) = frequency of genotype AA = number of AA individuals/ total number of individuals %3D 2pq = freq (Aa) = frequency of genotype Aa q? = freq (aa) = frequency of genotype aa Phenotype Number of People Able to smell thioesters 378 Unable to smell thioesters 1323 Total 1701 1. Calculate p and q for this population. 2. Calculate p?, 2pq, and q? for this population.

The problem is : The inheritance patterns of some traits in guinea pigs are listed in the table below. Corn snakes show variety in their skin color pattern. While the complete genetics of corn snake color are complex, the most common colors on normal corn snakes—red and black— are each coded by one gene. For the red gene, the allele for the presence of red pigment (R) is dominant and the allele for the absence of red pigment (r) is recessive. Likewise, for the black gene, the allele for the presence of black pigment (B) is dominant and the allele for the absence of black pigment (b) is recessive. Complete a Punnett square for the cross of two snakes that are heterozygous for the black color. What percentage of the offspring is expected to have black pigment in their skin? Explain your reasoning. Genotypes ____________________ x _____________________

Colony Morphology on TSA Plate ColoniesSize,Color, ElevationS. saprophyticus and  S. marcescens

Joe has a white cat named Sam. When Joe crosses Sam with a black cat, he obtains ½ white kittens and ½ black kittens. When the black kittens are interbred, all the kittens that they produce are black. > Is Sam's genotype homozygous dominant, homozygous recessive, or heterozygous? Based on these results, which coat color in cats would you conclude is a recessive trait? 1. white 2. black 3. homozygous dominant 4. homozygous recessive 5. heterozygous

The bison herd on Konza Prairie has begun to show a genetic defect. Some of the males  have a condition known as "rabbit hock" in which the knee of the back leg is malformed  slightly. This condition is controlled by a sex-linked gene and it is recessive. Now,  suppose that the herd bull (the dominant one which does most of the breeding) who is  normal (XN) mates with a cow that is a carrier for rabbit hock.  What are his chances of producing a normal son (bull)? If he mates with this cow every year, what percentage of their daughters will have normal knees? What percentage of their daughters will be carriers of rabbit hock?

In the USA the frequency of carriers for the devastating autosomal recessive trait of procrastination is 1/10 people. You do not procrastinate and want to have a child with another highly efficient non-procrastinator. You are worried that you both might be carriers and that your child would be a procrastinator. What is the probability that you are a carrier, AND your mate is a carrier, AND your child is procrastinator?

In mice, the presence of a dominant A allele results in the agouti pattern of fur color, whereas the aa homozygous recessive results in a solid color pattern. The presence of another dominant B allele results in black fur color, whereas the homozygous recessive bb results in brown fur color. The presence of a third dominant C allele is required for any color to be observed (brown or black), whereas the homozygous recessive cc results in lack of any color whatsoever (albino).  What is the phenotype of a mouse with the following genotype? Aa bb cc   albino Agouti color pattern and brown Solid color pattern and brown Agouti color pattern and black Solid color pattern and black