Answer:
1) the genes and chromosomes do not double after each generations because parental sex cells are haploid and only contain one set of chromosomes. During fertilization the two cells fuse to form a diploid zygote with two copies of genes and chromosomes. For example a normal human has 46 chromosomes (2 copies of 23 chromosomes) during reproduction gametes which contain 23 chromosomes (haploid) fuse to form an offspring with the correct number of chromosomes ( 23 + 23 = 46).
2) offspring only receive one set of chromosomes from each parent so to maintain the chromosome number of humans. If this did not happen you would not be the same species.
Answer:
D. By decreasing the activation energy of a reaction
Explanation:
Does you question have the following choices?
A) The density of the pebbles and sand would decrease.
B) The rock would become a plutonic rock composed mostly of quartz.
C) The rock would become more felsic with a higher concentration of magnesium.
D) The pebbles would become distorted and the sand would be recrystallized.
If so, then the answer is letter D.
> The change that would most likely to occur if this rock became buried deep within Earth’s crust and was subjected to intense heat and pressure, but did not melt is: The pebbles would become distorted and the sand would be recrystallized.
Question 8's answer is likely the first option, as it would pass that trait down to its offspring, the other two options do not work. The second option would be bad for the cactus, and the third wouldn't be passed down.
Answer:
Explanation:
The homozygous recessive individual can only produce 1 type of gamete (<em>aabb</em>).
The heterozygous individual can produce 8 types of gametes, of which 2 are parental and the rest are recombinant.
Genetic distance (m.u.) = Frequency of Recombination (%)
If the distance between genes A and B is 50 m.u., 50% of the gametes produced by the heterozygous individual, and therefore the offspring, will have recombinant phenotypes.
Without knowing that the genes are located on the same chromosomes, I'd think they are on different chromosomes, because you would get the same result: 50% recombinant offspring.
Whenever the genes on the same chromosome are separated by at least 50 m.u., or they are in different chromosomes, crossing over between them can happen with no restrictions and they will behave as independent of one another.
