The first answer should be the right one
Answer:
Reproductive cells have half the amount of chromosomes than body cells
Explanation:
I think that you are talking about body cells when you say "most cells in an organism." If that is the case, then the reproductive cells, sperm and egg cells, have half the amount of chromosome than body cells.
For example: Human body cells have 46 chromosomes. Human reproductive cells has 23 chromosomes.
In sexual reproduction, each parent gives 1/2 of a full set of chromosomes to create the full set needed for an organism.
Answer:
Strengthen the arms.
Explanation:
If a person repeatedly lift 25 pounds of weight over the head for 1 minute and then rest for 1 minute, the outcome of this exercise is to strengthen the muscles of the arms. The lifting of weight with the help of arms, the muscles of the arms will get stronger and increase occurs in the width of the arms. This exercise done by bodybuilders to get their arms stronger as well as athlete for stronger arms and hand muscles so the outcome of lifting the weight will leads to the increase in the strength of the arms.
Answer:
If the two organisms are heterozygous for the dominant trait.
Explanation:
For every trait, a diploid organism receives two forms of gene called ALLELE, from each parent. Allele is the variant form of a gene.
According to Mendel's law of dominance, for a particular trait, an allele is capable of masking the expression of another allele in a gene. The expressed allele is called the DOMINANT allele while the masked allele is called the RECESSIVE allele. Due to this, an organism can express a dominant trait even in a combined or heterozygous state i.e. different alleles.
When the two heterozygous organisms mate or are crossed, they undergo meiosis and their alleles are separated into GAMETES according to Mendel's law of segregation. For example; an organism with genotype (genetic make-up) Aa will produce gametes with A and a alleles.
Note that, a recessive trait can only be expressed in a homozygous state i.e. same allele. Hence, the two heterozygous organisms will produce gametes containing the recessive allele, which will likely combine to produce a recessive phenotype or trait.
