Correct answer: D). Deletion
Tay-Sachs disease is an autosomal hereditary disease that is known to affect the central nervous system. It results from the mutation caused in the gene that encodes for the beta-hexosaminidase enzyme. It is a lysosomal enzyme that is composed of the beta and alpha polypeptides.
It is caused when both the parents are a carrier, it occurs when a baby is born in absence of hexosaminidase. It affects the nervous system and can change the physical appearance after a few months of the birth.
Answer:
Phylogeny: It is related to evolution dealings in the evolutionary development of a species. It is represented by different ways vertical or slanted.
Phylogenesis: It refers to the evolutionary relationships among species.
Phylogenetics: It is determination or estimation of evolutionary relationships among groups of species, organisms and genes.
Phylogenetics is a field of biology which is used to find relationships among different organisms. This relationship is showing through a tree (used to model actual evolutionary relationship of organisms). Ancestral divided into two descendant species because closely related organisms are shown in near branches. If there is too much divergence between two species its mean they are not closely related.
The history of speciation (one species becomes divided into more than one new species) tells us how these species are related to each other. If they evolve to be separate species relatively recently then they are "closely relative" similarly if they evolve to be separate specie long above then they are "distant relatives". For example orthologs are genes in different species that evolved from common ancestor gene by speciation; they retain same function in the course of evolution.
Explanation:
Si.
Answer:
B. GUC only
Explanation:
Transfer RNA (tRNA) is a special type of RNA molecule that plays a vital role during translation. It matches an mRNA codon with its corresponding amino acid. The tRNA does this through a set of three nucleotide sequences called ANTICODON, that it contains.
The tRNA reads the mRNA codon using its anticodon, which is complementary to the mRNA codon. The reading is done following the complementary base pairing rule i.e. A-U and C-G.
Hence, a mRNA codon with nucleotides CAG will be read by a tRNA codon with GUC nuceleotide, which is complementary to it. Note that, the complementarity of the anticodon sequence makes it oriented in the 3'-5' direction.
C. Females have 1 X-chromosome & 1 Y-chromosome.
Males have 2 X-chromosomes.
Explanation:
human have increased the world's carrying capacity through migration agriculture Medical advances and Communications. the age structure of a population allows us to predict population growth.unchecked human population could have dire long term effects on our environment.
