B- black allele;
b- brown allele;
The parental cross is true-breeding because both the male and the female are homo zygotes, so: BBx bb
The F1 generation will be all black heterozygote: Bb
The F2 generation will be between mice of the F1 generation and they all have the same genotype:Bb xBb
In this cross it would result in:
1/4 of the plants being black homozygote-BB 25%
2/4 of the plants being black heterozygote- Bb- 50%
1/4 of the plants being brown homozygote- bb- 25%
answer: 25%+25%=50% are homozygotes
Answer:
It is called the S-A node, or rather sinus node.
Animals gives us nutrients because of the food they eat
Answer:
Rough endoplasmic reticulum is the most essential in the role of producing proteins. Ribosomes are contained on top of them to help produce proteins.
Explanation:
These proteins are necessary for us to go on about daily functions
