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#Question id: 5220

In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome #2 among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human #2 pair is not present; instead the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?

#Unit 11. Evolution and Behavior

The ancestral organism had 48 chromosomes and at some point a centric fusion event occurred and provided some selective advantage.
The ancestral organism had 46 chromosomes, but primates evolved when one of the pairs broke in half.
At some point in evolution, human ancestors and primate ancestors were able to mate and produce fertile offspring, making a new species.
Chromosome breakage results in additional centromeres being made in order for meiosis to proceed successfully.

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TLS Online TPP Program

#Question id: 23285

#Unit 8. Inheritance Biology

Chromosome are classified into four basic term,

Chromosome

A) Metacentric chromosome

i) centromeres present at the end of the chromosome

B) Submetacentric chromosome

ii) chromomere near the end of the chromosomes

C) Acrocentric chromosome

iii) Centromere in the middle of the chromosome and divides the chromosome into two equal arms.

D) Telocentric chromosome

iv) The centromere is present near the middle and divides the chromosome into two unequal arms

TLS Online TPP Program

#Question id: 23286

#Unit 8. Inheritance Biology

Individual chromosomes may lose or gain parts and the order of genes within a chromosome may become altered. These variations in the number and structure of chromosomes are termed as

TLS Online TPP Program

#Question id: 23287

#Unit 8. Inheritance Biology

Chromosome mutations can be grouped into three basic categories:

I) Chromosome rearrangements

III) Polyploidy

these mutation alters the number and structure of chromosomes such as,

a) One or more individual chromosomes are added or deleted

b) The loss of a chromosomal segment

c) A piece of a chromosome might be duplicated, deleted, or inverted

d) One or more complete sets of chromosomes are added

e) In which one or more copies of a DNA segment is produced

Find out the correct pairing of chromosomal mutations,

TLS Online TPP Program

#Question id: 23288

#Unit 8. Inheritance Biology

The staining of chromosomes with a special dye called Giemsa reveals G bands, which distinguish

TLS Online TPP Program

#Question id: 23289

#Unit 8. Inheritance Biology

Preparation and staining techniques help to distinguish among chromosomes of similar size and shape, this staining techniques also distinguish the banding pattern of the chromosome at which stage of cell cycle?

TLS Online TPP Program

#Question id: 23560

#Unit 13. Methods in Biology

DNA molecules which are constructed with DNA from different sources are called