A constant in an experiment is <u>B. </u><span><u>the quantity that must remain the same</u>. If it is constant, it doesn't change, so it cannot be variable. D makes no sense.
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Answer:
WHAT EXACTLY YOU WANT TO ASK?
Explanation:
Answer:
um it depends on how much money you have at that point
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Answer:
D) males are hemizygous for the X chromosome
Explanation:
Both males and females have two sex chromosomes, but females have two X chromosomes and males have one X chromosome and one Y chromosome. When only one copy of a gene is present in the cell of a diploid individual, that gene is in hemizygous condition.
- A female can be heterozygous for a sex-linked trait, one X chromosome carrying a dominant allele and the other X chromosome carrying the recessive allele. In that case, the expression of recessive allele will be masked by the expression of the dominant allele.
- Males, however, only have one X chromosome, so any allele it carries will be expressed, regardless of its dominance. For that reason, the frequency of appearance of sex-linked traits will be higher in males than in females.
