Answer:
Dominant
Explanation:
Let the allele for short tail trait be represented by "T" and allele for long tail trait be represented by "t"
When a short tailed mutant with genotype "tt" is mated with long tailed mouse, following offspring will be produced -
Tt * tt
Tt, Tt, tt, tt
so the ratio of short tailed and long tailed mouse is 1:1
Here it is given as 4:3 . Hence, there are chances that short tail trait is dominant
In the second generation , two short tailed mouse are crossed. The following offspring will be produced
Tt * Tt
TT, Tt, Tt, tt
The ration of short tailed and long tailed mouse is 3:1
Here it is given as 6:3 i.e 2:1 . Hence, short tail trait is dominant over long tail trait.
To test if the chickens lacked thiamine the scientist could test the blood concentration of thiamine in the chickens on a future study, unless blood samples were taken during the original study.
In any future studies, the same experiment would need to be done but with this added measurement on both the control group and the test subjects.
Molecules of dna that in humans are organized into twenty-three (23) complementary pairs are called the genome.
The genome is the entire set of DNA instructions found in a cell. In humans, the genome consists of 23 pairs of chromosomes located in the cell’s nucleus, as well as a small chromosome in the cell’s mitochondria. A genome contains all the information needed for an individual to develop and function.
DNA is the information molecule for all living organisms. All of the DNA of an organism is called its genome. Some genomes are incredibly small, such as those found in viruses and bacteria, whereas other genomes can be almost unexplainably large, such as found in some plants.
Learn more about DNA here:
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The lower the fossil the older it is.
So, if two fossils were in different layers of sedimentary rock, the lowest fossil is older.
