Answer:
given,
rose combed rooster (R) × single combed hen (r)
RR × rr
↓
in F1 generation, all the chicks will be Rr
↓
in F2 generation, mating was done among their own group of Rr
Rr × Rr
↓
25% of RR 50% of Rr and 25% of rr
phenotypes of chicks in f2 generation = 3:1 ( 75% rose combed as R is dominant and 25% single combed)
genotype = 1:2:1 ( 1/4 homozygous rose comb [RR] : 2/4 heterozygous rose comb [Rr] :1/4 homozygous single comb [rr])
Night blindness is caused by vitamin A
Answer:
So that the laws reduce pollution and have a reasonable cost
I think thats the right one
Answer:
Embryonic stem cells could be used to make more specialized tissues that have been lost to disease and injury. For tissues that are constantly replaced, like blood and skin, stem cells would probably be replaced directly. ... Embryonic stem cells could be grown into more specialized cells for screening potential drugs.
Explanation:
Draw the napa fires affecting homes, vineyards, etc. It's had a huge impact on California and its economy. :)
