You are studying a new allele of the yellow gene in pea plants (the gene that in Mendel’s experiments gave green peas with the yy allele combination). You refer to this new allele as y2. When you look at y2y2 homozygotes, you find that 80% of the peas are some shade of green and of these green peas 50% of them are the same full green shade as Mendel’s original yy allele and 50% of them are a shade that is halfway between yellow and green. Discuss these properties in terms of expressivity and penetrance.”

You have been hired to produce a family tree for three generations of a family where a disorder called “blinky” syndrome is observed. People who suffer from blinky syndrome blink their eyes rapidly when they look at bright lights. In order to draw a pedigree chart for this family, you interview Mike and Annie. Neither suffer from this syndrome.  Annie’s mother is normal, while Annie’s father blinked like crazy at bright lights. Annie has one sister and one brother and both of them are unaffected. While Annie’s sister has yet to have kids, her brother married a blinky sufferer. Mike’s mother is a blinker while his father is normal. Mike’s brother is just like their mother. In addition, this brother married a blinker. Mike’s sister is normal - as is her husband and their one boy.  Draw a pedigree chart below in order to answer the following on the next page. Use the letters A and a for the genotypes. If more than one genotype is possible for an individual - you may write it as A with a…

In the Pea plants studied by Mendel, green pod colour is dominant over yellow pod colour. You have grown the same species in your garden and the plant is producing only green pods. You were guaranteed by the garden store that it was homozygous (pure-breeding) but you are not completely sure. Show how you can find out.

Two genes are found in a chameleon, one for camouflage (dull colors dominant to vibrant colors) and another for muscle strength (strong dominant to weak), which seem to follow basic Mendelian inheritance patterns, To determine if they are linked, you set up a testcross and got the following results: Phenotype Number of Progeny Dull colors; Strong 98 Dull colors; Weak 76 Vibrant colors; Strong 72 Vibrant colors; Weak 105 Did you start this experiment with the genes in coupling or repulsion? O Coupling O Repulsion O Cannot determine with this information

This exercise is designed to give you some practice with Punnett squares and Mendel's principals of inheritance. Melanin is a chemical pigment produced in our body that contributes greatly to our skin, eye, and hair pigmentation -it also relates to color of fur, feathers, and such in animals. In general, the more melanin that is produced, the darker the color. A few genes contribute to the type and amount of melanin that is produced. Most people produce melanin in their skin, because it helps protect against the damages caused by the sun. This is why people tan. There is, however, a particular set of recessive alleles that cause a person to produce little or no melanin, and we refer to this as albinism. An animal or person who has little or no melanin is referred to as albino, and this can manifest in hair, skin, and eyes. For humans, this can be a rather dangerous condition as albinos are far more susceptible to sun damage, particularly cancer. In this exercise, the alleles are as…

Choose one pls

Sire Sire Parent B - First allele Sire B Parent B - Second allele b Now we take each allele from each parent and distribute it into the boxes in the appropriate row or column it borders, until each box has one gene pair - a color gene from parent A and a color gene from parent B. The completed square should look like this: Parent B - First allele B Dam Parent A - first allele Parent A - Second allele B Parent B - Second allele b Dam Parent A - first allele B BB Bb Parent A - Second allele b Bb bb This square now demonstrates the possible genotypes of the offspring if two hybrid parents mated. This table also demonstrates the likelihood of the offspring having that genotype. What are the genotypes and the likelihood (% chance) that each would be passed to offspring of these parents? Genotype % chance in offspring