<h2>B) is the correct option </h2>
Explanation:
- Collagen is a hard, insoluble, and fibrous protein that makes up one-third of the protein in the human body
- Molecules in collagen are packed together to form long and thin fibrils
- These act as supporting structures and anchor cells to each other and also give the skin strength and elasticity
- Collagen is the most abundant protein found in bones, tendons and muscle skin
- Collagen forms a scaffold to provide strength and structure
Because of these characteristics, genes associated with collagen is the best choice to base the phylogeny, rest all other options are not much diverse and specific to particular group of animal kingdom
The physical expression of genes are phenotype. Phenotype is the expression of the gene by the appearnace of the organism. It is the characteristics of that trait.
Examples : When pigment is made in our eyes, height ( tall and short) , weight, blond hair is the phenotype for the blond hair genotype and skin colour( black, white ) is the phenotype trait.
Answer: Nondisjunction means that a pair of homologous chromosomes has failed to separate or segregate at anaphase so that both chromosomes of the pair pass to the same daughter cell. This probably occurs most commonly in meiosis, but it may occur in mitosis to produce a mosaic individual.
Answer:
Variability was seen as imperfection, so natural selection could only eliminate the inferior and imperfect, not giving rise to new things, new species.
:
An allele is dominant and heterzygote (Pp) when a dominant allele (P) is crossed with a recessive allele (p).
Explanation:
A dominant allele is the one with a particular dominant character or phenotype which dominates even though there are other alleles found.
A heterozygous allele results from two different alleles coding for a gene.
A heterozygous dominant allele (Pp) results from the crossing of a dominant allele (P) with a recessive allele due to complete masking of the recessive allele (p).
For example, when dominant brown eyes are crossed with recessive blue eyes, in a heterozygous dominant allele results in brown eyes and masks the recessive blue eyes.
