<span>My pea plant has an unknown genotype for flowers, whether it has two dominant traits for white flowers (WW) or one dominant and one recessive (Ww) leading to white flowers; therefore I am doing a testcross in order to determine the genotype of my pea plant. The best plant to do this with is one that has a phenotype of purple flowers (ww) - that is, it is homozygous for the recessive trait.
If I use a homozygous recessive plant, I know exactly what its genotype is. I don't have to worry about whether it's got one or two dominant alleles; I know that at least half of my alleles are going to be the recessive w.
This makes identifying the offspring's genotype very simple. If I find that the offspring have at least some purple flowers among them, I know that my original plant had to be Ww; that is it had to have one dominant and one recessive allele for the flower color gene. If, however, all of the offspring are white flowers, I know that my original pea plant had both dominant alleles (WW).</span>
False because it's an "OPINION" not a FACT.
Human sperm and eggs contain 23 chromosomes. Human zygotes contain 46<span> chromosomes. The type of cell division that produces gametes with half the normal chromosome number is called meiosis. It is used to produce cells for repair and asexual reproduction.</span>
Protective membranous coverings that lie between bony coverings and the soft tissues of the cns are called the <u>meninges</u>
<h3>What are the brain meninges?</h3>
The brain meninges are the three protective membranous thin layers of tissue that cover and protect the brain and spinal cord of the nervous system. These meninges are:
- The dura mater
- Arachnoid mater
- Pia mater
So therefore, the protective membranous coverings that lie between bony coverings and the soft tissues of the cns are called the meninges
Learn more about the nervous system:
brainly.com/question/15564832
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