Q: In a pea plant, a homozygous tall plant (TT) is crossed with a homozygous dwarf plant (tt). Find the phenotypic and genotypic ratio of the F2 generation. Show complete step-by-step working.

Step 1: Identify parental genotypes and phenotypes.\nParent 1 (Homozygous Tall) = TT\nParent 2 (Homozygous Dwarf) = tt \nStep 2: Determine gametes produced by parents.\nParent TT produces gametes with allele: T\nParent tt produces gametes with allele: t \nStep 3: Cross parents to find F1 generation.

Q: If a pure tall pea plant with round seeds (TTRR) is crossed with a pure dwarf pea plant with wrinkled seeds (ttrr), what will be the phenotype of the F1 generation? Explain the reasoning behind your a

Step 1: Identify parental genotypes and phenotypes.\nParent 1 (Homozygous Tall, Homozygous Round Seeds) = TTRR\nParent 2 (Homozygous Dwarf, Homozygous Wrinkled Seeds) = ttrr \nStep 2: Determine gametes produced by each parent.\nParent TTRR produces gametes carrying: TR\nParent ttrr produces gametes

Question 1

What is heredity? Explain its significance in the continuity of life on Earth.

Accepted Answer

Heredity refers to the transmission of genetic characters or traits from parents to their offspring, either through sexual or asexual reproduction. This process is the primary reason why offspring resemble their parents, sharing physical, physiological, and biochemical characteristics. The significa

Question 2

Explain Mendel's Law of Segregation with the help of a monohybrid cross.

Accepted Answer

Mendel's Law of Segregation, also known as the first law of inheritance, states that during the formation of gametes, the two alleles of a gene separate or segregate from each other so that each gamete receives only one allele for each trait. To understand this, let us consider a monohybrid cross be

Question 3

In a pea plant, a homozygous tall plant (TT) is crossed with a homozygous dwarf plant (tt). Find the phenotypic and genotypic ratio of the F2 generation. Show complete step-by-step working.

Accepted Answer

Step 1: Identify parental genotypes and phenotypes.
Parent 1 (Homozygous Tall) = TT
Parent 2 (Homozygous Dwarf) = tt 
Step 2: Determine gametes produced by parents.
Parent TT produces gametes with allele: T
Parent tt produces gametes with allele: t 
Step 3: Cross parents to find F1 generation.

Question 4

How is sex determined in human beings? Explain the genetic mechanism involved.

Accepted Answer

Sex determination in human beings is a genetic process controlled by sex chromosomes. Humans possess 23 pairs of chromosomes, out of which 22 pairs are autosomes and 1 pair consists of sex chromosomes. Females have two identical sex chromosomes designated as XX, while males have one X chromosome and

Question 5

If a pure tall pea plant with round seeds (TTRR) is crossed with a pure dwarf pea plant with wrinkled seeds (ttrr), what will be the phenotype of the F1 generation? Explain the reasoning behind your a

Accepted Answer

Step 1: Identify parental genotypes and phenotypes.
Parent 1 (Homozygous Tall, Homozygous Round Seeds) = TTRR
Parent 2 (Homozygous Dwarf, Homozygous Wrinkled Seeds) = ttrr 
Step 2: Determine gametes produced by each parent.
Parent TTRR produces gametes carrying: TR
Parent ttrr produces gametes