Answer:
610:190 round seeds: wrinkled seeds
Explanation:
A cross between two true breeds, involves crossing two parents that are each homozygous for the traits they carry.
A cross between a true breeding round parent (RR) and a true breeding wrinkled plant (rr), will produce all heterozygous offspring:
Rr : 100% in the F1 generation.
When these heterozygous offspring are crossed, Rr x Rr, the proportion obtained genotypically in the second filial generation is:
- 25% homozygous round (RR)
- 25% homozygous wrinkled (rr)
Considering the importance of dominance in phenotypic expression, round seeds being dominant over wrinkled seeds, indicates that about 75% of the offspring are expected to appear round and 25% expected to appear wrinkled. Putting this phenotypic proportion into perspective,
<em>610:190 round seeds:wrinkled seeds,</em> is the ratio in line with the proportion expected to see in the F2 generation.
Sugar is an edible crystalline substance that is derived from sugarcane or sugar beet. Sweeteners are additives that are incorporated in foods for adding sweetness. In fact, sweeteners may be natural or artificial and are used as substitutes for sugar. ... Sweeteners are also often sweeter than sugar or sugar substitutes.
Answer:
Explanation:
Leopard seals use their powerful jaws and long teeth to kill smaller seals, fish, and squid. These effective predators live in frigid Antarctic and sub-Antarctic waters, where they also eat penguins. They often wait underwater near an ice shelf and snare the birds just as they enter the water after jumping off the ice.
A radio interferometer is a series or array of radio antennas or elements that are used primarily for astronomical observations. These antennas receive radio waves from the same astronomical object and then joined together to the same receiver. They may be placed close to one another or kilometers apart. Radio interferometer's dynamics are similar to that of an optical interferometer, but since radio waves are much longer than light waves, the scale of the said instrument is much greater.
Answer:
electrical impulse travels from the sinus node to the atrioventricular node across the cells of the heart left and right atria.
When the impulses get to the atrioventricular node which is located between atria and ventricles,it slow down for a short period of time
Explanation:
Heart excitation starts from the sinoatrial (SA) node then propagates through right and left atria. The atrial depolarization expands to the atrioventricular node, and move via the bundle of His to the bundle branches or Purkinje fibers.
electrical impulse travels from the sinus node to the atrioventricular node across the cells of the heart left and right atria.
When the impulses get to the atrioventricular node which is located between atria and ventricles,it slow down for a short period of time and it's then continue the conduction pathway through bundle of His into ventricles.