Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Biology

Seminal plasma, the fluid part of semen, is contributed by.

1. Seminal vesicle
2. Prostate
3. Urethra
4. Bulbourethral gland

Vas deferens receives the duct of seminal vesicle and forms the ______.

ells of Leydig occur in ______.

Seminal vesicles are located in ______.

A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?

In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that ______.

In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates ______.

Two linked genes a and b show 20% recombination. The individuals of a dihybrid cross between ++ /++ × ab/ab shall show gametes ______.

A normal green male maize is crossed with albino female. The progeny is albino because ______.

A dihybrid condition is ______.

Mendel’s last law is ______.

The process of mating between closely related individuals is ______.

A fruit fly exhibiting both male and female traits is ______.

In a dihybrid cross AABB x aabb, F2 progeny of AABB, AABb, AaBB and AaBb occurs in the ratio of ______.

In a dihybrid cross, F₂ phenotypic ratio is 13 : 3. It is case of ______.

Mendel’s Law of independent assortment holds good for genes situated on the ______.

Two genes ‘A’ and ‘B’ are linked. In a dihybrid cross involving these two genes, the F₁ heterozygote is crossed with homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?

Chargaff’s rules are applicable to ______.

One turn of DNA possesses ______.

If a double stranded DNA has 20% of cytosine, what will be the percentage of adenine in it?