Answer:
The dominant curled wing allele is also a recessive lethal.
Explanation:
If we look at the F2 ratio we see that :
curled wings: straight wings= 160:80
=2:1
Hence, if curled wings is considered to be a dominant trait then Curled wings * straight wings
Dd x dd
Punnet square will be as follows :
d d
D | Dd | Dd
d | Dd | dd
Hence in order to get F2
Dd x dd
Punnet square will be the same as above if the F1 cross is Dd* Dd
D d
D DD Dd
d Dd dd
if DD is lethal then the ratio is
Dd:dd=2:1
that is curled wings: straight wings=2:1
Hence, The dominant curled wing allele is also a recessive lethal.
In the
process of the nitrogen cycle.
<span>
The nitrogen cycle is a
biogeochemical succession process of nitrogen that involves: fixation,
ammonification, nitrification, and denitrification. Like any other
biogeochemical cycles. This process undergoes and affects the biological, geometrical
and chemical aspects in the ecosystem and the abiotic and biotic community. Hence,
the nitrogen cycle leads the abiotic component –nitrogen- to contribute to the
biotic community, decomposition and primal production. Further, it becomes an
essential part of the environment because some life components are contains it,
similarly, amino acids, nucleic acids in RNA and DNA. </span>
The medical term for this is the endicrine.
Answer:
the correct answer is D
Explanation:
In the germinal stage it is said that it lasts between 10 days and two weeks. During this stage, the fertilized egg divides and advances through the fallopian tube until it implants in the wall of the uterus.
If it cannot be implanted in the wall of the uterus, then it is considered a miscarriage due to the pregnancy, it cannot be carried out and it is very rarely perceived by the woman that the presence of the fertilized cell is imperceptible in bleeding.
