Biology questions
20584 published questions with worked solutions.
- X-linked recessive gene is
- Example of environment determination of sex is/are
- A marriage between normal visioned man colorblind women will produce which of the following types of offspring?
- Gene for color blindness is located on
- If a character is always transmitted directly from a father to all his sons and from their sons to all their sons, then which...
- If a colorblind woman marries a normal visioned man, their sons will be
- In sex linkage, the speciality is
- In which of the following disorders, blood has a defective haemoglobin?
- The traits which are not expressed due to a particular gene but are expressed byproducts of sex hormones are
- In XX and XO chromosomal sex-determination, there is absence of one chromosome in
- In bugs and cockroaches, the sex-determination takes place by
- Female is heteromorphic and male is homomorphic in
- The chromosomal denotation for heterogametic female and homogametic males are
- When one sex chromosome lacks is females and males are homogametic. The sex chromosomal representation in that case is given as
- Haplo-diploid mechanism of sex-determination (haplodiploidy) takes place in
- In haplodiploidy determination of sex, male is
- Females in haplodiploidy sex determination are
- An abnormal human baby with 'XXX' sex chromosomes was born due to
- Thalassemia is
- Color blindness is caused due to