Explanation

Explanation

Explanation

The Law of Independent Assortment states that alleles for different traits are segregated independently of one another during gamete formation.

This is illustrated in a dihybrid cross where two pairs of contrasting traits are examined.

Explanation

Gene cloning creates multiple identical copies of a specific gene or DNA sequence.

It using techniques like PCR or DNA cloning vectors.

To amplify and study specific genes or genetic elements.

Explanation

• Meiosis is a type of cell division that occurs in spore-producing organisms, such as plants and fungi, to produce spores.
• In meiosis, a diploid spore mother cell (sporocyte) undergoes two successive cell divisions (meiosis I and meiosis II) to produce four haploid spores.

Explanation

Animals are classified into two main groups:

1. Invertebrates (animals without a backbone). Examples: insects, spiders, squids, octopuses, starfish, corals, worm
2. Vertebrates (animals with a backbone. Examples: fish, amphibians, reptiles, birds, mammals (including humans)

Explanation

In Mendel's pea plant experiments,

When he crossed purebred pea plants with contrasting traits (like purple and white flowers),

The F1 generation offspring all exhibited the dominant trait (purple flowers in this case).

The recessive trait (white flowers) disappeared in the F1 generation but reappeared in the F2 generation when the F1 plants self-fertilized. T

his reappearance of the recessive trait in the F2 generation confirmed that the recessive allele was still present in the F1 generation, just masked by the dominant allele. 

Explanation

The enzyme that synthesizes DNA,

DNA polymerase can only add nucleotides to an already existing strand or primer of DNA or RNA that is base paired with the template.

ND5-07-2023

Explanation

Pyrimidine: A nitrogenous base similar to benzene (a six-membered ring) and includes cytosine, thymine, and uracil as bases used for DNA or RNA.

Adenine is a purine nucleobase

Adenine, guanine, and cytosine are common nitrogenous bases present in both DNA and RNA

Explanation

• Water vascular system in echinoderms used for Respiration
• ***
• The Water Vascular system in echinoderms is also used for locomotion, food, and waste transportation.
• The water vascular system helps in respiration, as the gaseous exchange takes place on the thin wall of feet tubes.
• The system consists of a central ring canal and radial canals extending along each arm