Assume a population of salamanders is migrating south from Oregon and into California.  When these organisms reach the Sierra Nevada Mountains, the population will split into two populations.  One population is residing on the eastern slopes and a second population inhabiting the western slopes of the mountain range.  What type of speciation will most likely take place?

Anatomy of the pancreas

Hormone function.

Endocrine terminology.

Regulation of hormone release.

Endocrine function

What is the skill that Daulerio says he’s really good at?

Melanin synthesis (which produces pigment) in the eye is determined by 2 genes. The OCA2 gene controls melanin synthesis; MM or Mm = brown color; mm = blue color The HERC2 gene controls (“switches on”) the OCA2 gene; HH or Hh = brown color; hh = blue color. Therefore, a homozygous recessive genotype for either gene (i.e., hh or mm) results in blue eyes. Two parents, one with blue eyes and one with brown eyes, have the following genotypes: hhmm and HhMm . What is the probability that they will have a blue-eyed child?  (Use the forked-line method or do a Punnet square).

Breast cancer shows autosomal dominant inheritance with incomplete penetrance among females who inherit one affected BRCA2 allele. In a study 30 of 50 females who inherited a BRCA2 mutation developed breast cancer by 80 years old. What is the penetrance of breast cancer in this population of females?

Spinal muscular atrophy (SMA) type I shows autosomal recessive inheritance. Assuming complete penetrance, if two heterozygous individuals have a child, what is the probability the child will be affected with SMA type I?