2.7 oz of fish or other seafood
Science keeps "improving", so the scientific theories and ideas from the past are either expanded on or proved to be false. The concept of planets has definitely seen changes, with Pluto peven being considered not a planet. In the 20 century we believed there were 9 planets but now there is considered to be 8. Science exists as it is but as humans we are constantly discovering more of it because of improvement in the times and technology. Science that proves to be accurate will never be discredited though it will be improved upon .
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Answer:
A)
Hh * hh
Hh, Hh, hh, hh
Out of four two calves are horned. Thus ratio of horned calves is ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
B)
Hh * Hh
HH, Hh, Hh, hh
Out of four one calf is horned. Thus ratio of horned calf is ![\frac{1}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D)
C)
Hh * hh
Hh, Hh,hh, hh
Out of four two are polled . Thus ratio of polled calves is ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
Explanation:
Allele for dominant polled /hornless cattle is H
Allele for recessive horned cattle is h
A) Polled bull X horned Cow A ----> horned calf
This signifies that the polled bull is heterozygous with genotype Hh
Hh * hh
Hh, Hh, hh, hh
Out of four two calves are horned. Thus ratio of horned calves is ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
B) Polled bull X polled Cow B ----> horned calf
Both Bull ad cow are heterozygous with genotype Hh
Hh * Hh
HH, Hh, Hh, hh
Out of four one calf is horned. Thus ratio of horned calf is ![\frac{1}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D)
C) Polled bull X horned Cow C ----> polled calf
Hh * hh
Hh, Hh,hh, hh
Out of four two are polled . Thus ratio of polled calves is ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)