What is Mendelian inheritance? a. Mendelian genes code an entire phenotype so that children will not be clones of their parents. b. Mendelian genetics are those genes that code for dominant or recessive illnesses but only if no polygenic traits cancel them out. c. Mendelian genes sit at one loci with one allele from Mom and one allele from Dad. d. Mendelian genetics is when two or more genes at two or more loci express one trait

In this figure, the black circles and squares indicate a genetic disease. A. Based on the pedigree in the figure, does this gene appear to be inherited in a dominant or recessive manner? Explain your prediction. B. Use the letter a to indicate a disease allele and the letter A to indicate a normal allele. Predict the genotypes of the original parents. C. What percentage of the offspring of the original parents would you expect to have the disease? D. Predict the genotype of the partner of the diseased daughter in generation II. Justify your prediction.

Using the same information listed above for hair and eye color, (E = dominant brown eyes with e = recessive blue eyes; R = dominant brown hair and r = recessive blond hair), if the mom was heterozygous for both eye color and hair color what would her genotype be?   a. EERR b. eerr c. EeRr   What would be the 4 possible gametes the heterozygous mom could contribute?   a. RE, Re, rE, re b. Rr, Ee, RE, re c. RR, rr, EE, ee

Rupert and Leona's bunnies liked to play with their food. One night while playing with their corn, Leona decided to make their nasty habit into a fun genetics lesson. The bunnies counted the color of each kernel they ate. When they finished they had counted 502 purple and 1518 white kernels. What ratio should the bunnies accept (based on chi square) as they try to determine the parental genotypes of their supper? a. 15:1 b. 3:1 c. 9:7 d. 1:1 e. 13:3

Shaded individuals in this pedigree express a particular trait. Based on this pedigree, what is the mode of inheritance of the trait? O A. autosomal dominant O B. autosomal recessive OC sex-linked dominant D. sex-linked recessive

On occasion, a trait that appears to be autosomal is produced in unexpected ratios in male and female offspring. What is this an example of?   A. codominance   B. sex-linked genes   C. multiple alleles   D. amniocentesis

Which of the following states a valid conclusion based on the pedigree above? Select one: a. Individuals II-5 and II-6 are carriers of the red-green colour blindness allele. b. All children of individuals I-1 and I-2 could be carriers of the red-green colour blindness allele. c. Individual I-2 does not carry the red-green colour blindness allele. d. It is not possible to determine whether individuals III-2 and III-3 are carriers of the colour blindness allele. e. Individual II-2 passed on the red-green colour blindness allele to individual II-1.

Two albino parents have four unaffected children. If albinism in the parents is given by mutations on two different genes (A and B) and complementation is observed in all four children, what are the genotypes of the parents? A.  AaBb and AABB   B. AABb and AaBB   C. both parents are AaBb   D. AAbb and BBaa

In organisms with X and Y chromosomes, many more genes can be found on the X chromosome than on the Y chromosome. In mammals, how might this deviate from traits being expressed, according to Mendel?   A. Females might exhibit a mix of traits rather than all dominant or all recessive traits.   B. Only females will have the traits resulting from the X-linked genes.   C. Females will overproduce some proteins in relation to males’ production levels.   D. This will not result in individuals deviating from Mendel’s principles.

Which of the following is true of recessive sex-linked genes? A. A female showing the trait will pass it on to all of her sons who will all show the trait. B. A female showing the trait will pass it on to all of her daughters who will all show the trait. C. A male showing the trait will pass it on to all of his sons who will all show the trait. D. A male showing the trait will pass it on to all of his daughters who will all show the trait.