LARI 2 3 4 5 6 7 8 9 Topic 2: Inheritance (cont.)
normal male
normale
with so
O with
b) (ii) The geneticist crossed dog 4 with dog 5. Approximately half the offspring
had acatalasia and half the offspring did not. Complete the genetic diagram to
show how this is possible. The normal allele is represented by B and the mutant allele is
represented by b. [3 marks]
Dog 4
Dog 5
Parental phenotypes
normal
acatalasia
Parental genotypes
Offspring genotypes
Offspring phenotypes

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.