Answer:
All their descendants will be heterozygous for the skin color, Bb, expressing blue skin.
Explanation:
<u>Available data</u>:
- Smurfette has light blue skin
- Her family is a "true bred" or "purebred" line.
- She married a boy who has light yellow skin
- blue skin is the dominant trait expressed by the B allele
- yellow skin is a recessive trait, expressed by the b allele
Cross: Smurfette x Husband
Parentals) BB x bb
Gametes) B B b b
Phenotypes) blue skin yellow skin
Punnett square)
B B
b Bb Bb
b Bb Bb
F1) 100% of the progeny will be heterozygous for the skin color, Bb
100% of the progeny will be blue-skinned.
Note: Although the progeny is blue-skinned, they are not true-bred anymore.
Answer: Blood sugar/blood glucose levels are controlled by negative feedback involving the hormones human insulin and glucagon.
Explanation:
Insulin is produced in the increased , if there is too little glucose in the blood the pancreas is triggered and released more insulin to change glucagon into glucose, this regulates the amount of glucose in the blood. However if there is too much glucose in the blood (after a sugary meal) the pancreas is triggered to use insulin to lower the blood glucose levels, this is called negative feedback. This works by storing glucose as glucagon in the blood, insulin can be objected into the blood stream if a person needs it straight away(eg type 1 diabetes.)
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Answer: I included a labeled graph of both a plant cell and an animal cell. I don't know if you needed an explanation of what they do, too, but I'll include it anyway.
Explanation:
The Cell Membrane, or plasma membrane, provides protection for the cell. It also transports substances in and out of the cell.
The Cell Wall (only plants) provides the structure for a plant, as well as added protection.
The Mitochondria are the powerhouse of the cell, providing energy for our cells to do their work. They produce a small molecule called ATP (adenosine triphosphate), where the energy is stored and sent to where it is needed.
The Lysosomes are the waste facilities of cells. They breakdown excess or worn-out cell parts, destroy foreign or invading bacteria, and digest macromolecules (carbs, lipids, proteins, and nucleic acids)
