Answer: The Leber's hereditary optic neuropathy (LHON) is caused by defective genes contained in mitochondrial DNA.
Explanation:
LHON is causes the vision loss. This occurs due to mutation in the mitochondrial DNA. The symptoms are not associated vision loss thus it is difficult to predict that which member of family was the carrier of the disease. Some people do not get completely blind. A young male is expected to develop a risk of 50% development of this disease.
C. 1/4
D. 9/16
Answer:
A. 3/16
Explanation:
The plants with wrinkled, green seeds (rryy) and round, yellow seeds were crossed. Since the progeny did not show a "wrinkled" trait, the parent plant with "round" seeds was homozygous for seed shape and heterozygous for the seed color (RRYy). The genotype of the double recessive parent plant would be "rryy".
A cross between RRYy x rryy gives progeny in following ratio: 1/2 round, yellow seeds( RrYy ): 1/2 round, green seeds (Rryy)
The F2 progeny was obtained by self crossing RrYy plants. In F2 progeny, 3/16 plants (2/16 RRYy and 1/16 rryy) were genotypically identical to the parent plant.
that apply)?
Select one or more:
a. warm, moist summers and cold, dry winters
b. Dominance by grasses
c. High soil fertility
d. long, severe winters
e. evergreen vegetation
Answer:
sugar
Explanation:
plant converts ATP to sugar
If the Midwest experiences a severe drought that damages the corn crops, we should expect the supply of corn to decrease and the price of corn to rise.
Severe drought is a long period of abnormally low rainfall and dry weather, in a specific region, which negatively affects plants and living organisms. Severe droughts can have a considerable effect on the agriculture and ecosystem of the affected region. Severe drought damages crops, thus it influences crop production.
A. thin brown stalks
B. the sperm
Answer:
The sporophyte stalk, called the seta, bears the sporangium (spore capsule) on its tip. One sporangium may produce up to a million spores.
Answer:
Protein synthesis, RNA sequestration, RNA transport and to control transcriptional gene.
Explanation:
The role of non-coding RNAs in transcriptional regulation as well as proteins synthesis etc. Non-coding RNAs is responsible for controlling different processes like protein synthesis, RNA sequestration, RNA transport and to control transcriptional gene through epigenetic regulation and chromatin remodeling. By interacting with DNA, RNA and proteins, non-coding RNAs can regulate chromatin structure and function and the transcription of neighboring.