Colorblindness is a sex-linked trait. a mother with normal vision and a man who is colorblind have a colorblind daughter. what statement must be true about the parents?

The child must have a father who is colorblind and a mother who is a carrier/ is colorblind.

Explanation:

The genetic code for color blindness is carried upon the x chromosome. This means that a male- who has only one X chromosome- only needs their mother to be a carrier to be colorblind. Women on the other hand, need two to be color blind, as the faulty x chromosome can be weeded out by the other.

Therefore, the father, in order to pass on the colorblindness, must be colorblind himself, whereas the mother only needs to be a carrier (or can be completely color blind herself).

A)The mother is a heterozygous carrier

Explanation:

A)The mother is a heterozygous carrier.   - only one that makes sense

B)The father is a heterozygous carrier.  - he is double recessive

C)The mother cannot have the colorblind gene.- that is possible

D)The mother is homozygous dominant for normal vision. - that would mean the 100% of the offspring would be normal

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

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