A physician observes blood vessels in a normal umbilical cord - which does he/she see on the cut end of the cord? 2 umbilical veins, 1 umbilical artery

1 umbilical vein, 2 umbilical arteries

1 umbilical vein, 1 umbilical artery

2 umbilical veins, 2 umbilical arteries

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

The color of the fur is the genotypephenotype.the genetic combination of alleles that determine the fur color is called the genotypephenotype.

Red blood cells are responsible for transporting oxygen in the blood. people with sickle cell anemia were born with a defective gene that results in sickle-shaped red blood cells. individuals with the disease often suffer pain in their extremities due to the build-up of these cells causing blockages in the blood vessels. the shape of the blood cells also reduces the amount of oxygen transported in the blood.