Reproduction, Heredity, Variety in fitness of population, and variety in characters among the population are all four conditions for natural selection.
C. A lipid
It's because lipids include glycerol and fatty acids.
Explanation:
a) The allele for hemophilia is Xh and that for normal is XH.
Crossing a hemophiliac male, Xh Y, with a normal female XH XH,
- XH Xh, normal carrier female
- XH Xh, normal carrier female
- XH Y, normal male
- XH Y, normal male
b) Both parents are normal and children still having hemophilia means that the mother is a carrier.
Let's see how it'll work out if we cross a normal male with a carrier female,
XH Y × XH Xh
- XH XH, normal female
- XH Xh, carrier female
- XH Y, normal male
- Xh Y, hemophiliac male
This means that the possibility of a female being normal, a carrier or not, is 100%. The possibility of a male being normal is 50% and the possibility of him being a hemophiliac is also 50%.
Thus it's possible that all 7 sons get hemophilia as each male baby has a 50% chance of having the genotype Xh Y. And it makes sense that all the females are normal. Those females could have the genotypes XH XH, or XH Xh (carriers).
Answer:
taking the pretest
Explanation:
A one-group pretest–posttest design is a type of research design generally used in behavioral research aimed at estimating the treatment effects on the sample. In this experimental design, the target group of participants is first pre-tested on the dependent variable and, subsequently, post-tested after the administration of a treatment. In consequence, the participants of the target group receive the same treatment and assessment. The problem of testing effects indicates that testing may become a problem when the pretest may change participant's behavior. When there are statistically significant differences between the pretest and posttest data, it is possible to support the working hypothesis.
Answer:
Messenger RNA (mRNA), molecule in cells that carries codes from the DNA in the nucleus to the sites of protein synthesis in the cytoplasm (the ribosomes).
Explanation: