Answer:
Cross overs can lead to formation of chromosome pairs that have no mutant allele.
Explanation:
Cross overs can lead to formation of chromosome pairs that have no mutant allele.
For example -
Suppose "X" is a mutant allele and "x" is a mutant free allele.
Now when two homologous chromosomes contains a single mutant allele in different parts of the chromosome are crossed the following offspring are produced
X x
X XX Xx
x Xx xx
"xx" is a mutant free genotype.
Thus, crossing over can create a single mutation-free chromosome
Answer:
B
Explanation:
The Earth is tilted 23.5 degrees on its vertical axis. During the northern hemisphere's spring and summer, the northern hemisphere is tilted towards the Sun.
Answer: Testable Question
Explanation:
- testable questions are always about
changing one variable to see what the
effect is on another variable.
- Can be answered through
that involve experiments, ,
or surveys
, investigations
, observations
<h2><u>DONT FORGET TO MAKE ME BRAINILIST</u></h2>
cyanobacteria
it is one of the earliest organisms
