Tall stem flowering plants are dominant over short stems flowering plants but orange roses are recessive compared to pink roses. When 2 plants are pollenated with one another, what is the likelihood of having a short stem flowering plant if one homozygous dominate parent is a tall stem flowering plant with pink roses and the other parent is a short stem flowering plant with orange roses? (QID 133808)

A. 100%
B. 50%
C. 25%
D. 0%

In a dihybrid cross, big ears (R) is dominant over small ears (r) but brown coat (T) is dominant over tan coat (t). What is the fraction of offspring that will have small ears and tan coats if both parents are heterozygous for both traits, assuming Mendelian inheritance in accordance with the law of independent assortment? (QID 133807)

A. 1/16
B. 3/16
C. 9/16
D. 7/16

Ms. Wilson who is pregnant and believed to be a carrier of Tay-Sach’s Disease, an autosomal recessive disease. She would like your professional opinion regarding the likelihood of her son being born with this disease. Genetic analysis of her disease-free husband shows that he is heterozygous for this disease. Which of the following should you tell her? (QID 133806)

A. You have nothing to worry about because your husband is disease free.
B. Your child will almost certainly have the disease since you have the disease.
C. Your child has about a one-quarter percent chance of inheriting the disease.
D. Your child has a three-quarter percent chance of inheriting the disease and a 25%
chance of being a carrier of the disease.

A couple comes into your clinic seeking genetic counseling before having children. The wife has a mild form of a recessively inhered condition and, after further probing, you find that the husband is a very likely carrier of the disease. What is the probability that their 1st child will NOT be affected with the disease? (QID 133805)

A. 25%
B. 50%
C. 75%
D. 100%

The process that distinctively increases the genetic diversity of gametes by shuffling the genes between two paired chromosomes is called __________ and happens during ___________. (QID 133804)

A. disjunction, metaphase I
B. DNA replication, the S phase
C. crossing over, prophase I
D. interkinesis, telophase I

Vinblastine and vincristine are anticancer drugs used to treat breast cancer. These vinca alkaloids inhibit microtubule polymerization thereby preventing spindle fiber elongation and centromere attachment. Which type of cell division and during which phase do these drugs target? (QID 133803)

A. mitosis, telophase
B. meiosis, prophase
C. mitosis, metaphase
D. meiosis, anaphase

During the initiation of meiosis, the number of alleles for each gene at the beginning of Prophase I is ___________ and is titled ___________: (QID 133802)

A. 8, tetraploid
B. 4, diploid
C. 2, diploid
D. 1, haploid

Meiosis is a cell division process that results in the production of…. (QID 133801)

A. identical diploid somatic cells
B. identical haploid somatic cells
C. genetically diverse diploid gametes
D. genetically diverse haploid gametes