Answer:
50% portion are from mother...
Explanation:
If crossing over does not occur then 3 auto-somes as well as one X chromosome shall always come from mother. Even if two XX were present in case of a female 50% of chromosomes shall always be contributed by the mother...
Answer:
what is the probability of this couple having a child who is a non - roller ?
bb X Cc= bC, bc, bC and bc
The probability of the couple having a child who is a non-roller is 1/2
Explanation:
homozygous bb= non-roller father
heterozygous Cc= roller
From the crossing above we have equal halves of both roller and non-roller
1/2 roller
1/2 non-roller while the becomes heterozygous and roller is also heterozygous
Answer:
no:2,3
explanation
energy is the ability to do work
period is the about of time to complete one circle
while frquency is the number of circles completed per seconds.
The birds that have beaks better equipped for the task of eating worms under ground. Narrow, sharp and strong beaks would be better at digging through the dirt to find worms. So birds with these types of beaks would be fitter and thus, would survive.