HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions for Biology

Give one example of the autosomal recessive disorder.

What are X-linked genes?

Explain the haplo-diploid method of sex determination in the honey bee.

In human beings 45 chromosomes/single X/XO abnormality causes ______.

How many linkage groups are present in Drosophila melanogaster?

Write a note on sex linkage.

Differentiate between complete and incomplete linkage.

Explain the mechanism of sex determination in birds.

Describe the structure of sex chromosomes with the help of labelled diagram.

Write a note on bleeder’s disease and its inheritance with a suitable chart.

Explain codominance in colour coat in cattle with checker board method.

Explain the structure of chromosomes with labelled diagram.

Give an account of one Mendelian and one chromosomal disorder you have studied.

Explain the law of dominance and compare how it differs from incomplete dominance and co-dominance.

Name any two X-Linked recessive disorders.

Give examples of X-linked traits.

Which of the following group shows ZW-ZZ type of sex determination?

Differentiate between X-chromosome and Y-chromosome with reference to –

1. length of non-homologous regions
2. type as per the position of the centromere

Define – Incomplete dominance.

If a red flowered Mirabilis jalapa plant is crossed with a white flowered plant, what will be the phenotypic ratio in F2 generation? Show it by a chart.