Answer:
Gravitational forces.
Explanation:
The same reason the earth revolves around the sun, its all thanks to gravity!
-I hope this answers your question!
Nucleotides. They are the building blocks of DNA.
Answer:
I believe that it is the lettuce.
Explanation:
it is the fist thing in the graph so it is the start/producer of the chain.
Answer: D
Explanation: Because new dog breeds are made when people mix two different breeds together to make another breed
Answer:
The female (XcX) is carrier for color blindness while the male (XY) is normal. The carrier female transmits its one X chromosome with gene for color blindness to one of her sons making him color blind.
Explanation:
Color blindness is X linked recessive disorder and followed the criss-cross inheritance wherein the color blind sons get the gene from their carrier/affected mother while the color blind father would transmit the gene to his daughters along with X chromosome.
Since both the parents are normal, the mother (XcX) should be carrier for the disease to get the color blind son. A cross between carrier mother (XcX) and normal father (XY) would make 50% of their sons color blind.