In humans, if gene B gives brown eyes and gene b gives blue eyes. What will be the colour of eyes of the persons having the following combination of genes?
(a) Bb (b) bb (c) BB
In humans, gene B responsible for brown eyes is dominant over the gene b responsible for blue eyes.
Thus,
(a) Bb: will express brown eyes.
(b) bb: will express blue eyes (because recessive gene, b, expresses itself only in the absence of dominant, B, gene).
(c) BB: will express brown eyes.
Related Articles
- (a) E is the gene for brown eye colour and e is the gene for blue eye colour. Which gene is (i) recessive, and (ii) dominant?(b) Both father and mother have the genes Ee in their cells. What colour are their eyes? (c)Which combination of genes in the zygote will produce children with blue eyes? (d)Which combinations of genes in the zygote will produce children with brown eyes?
- In the following question, two statements are given --one labelled Assertion (A) and the other labelled Reason (R).Assertion (A): In humans, if gene b gives blue eyes and gene B gives brown eyes then the colour of the eyes of a person having Bb combination of genes will be blue.Reason (R): The recessive gene cannot show its effect in the presence of dominant gene.Select the correct answer to the above question from the following options:(a) Both A and R are true, and R is the correct explanation of the assertion. (b) Both A and R are true, but is not the correct explanation of the assertion.(c) A is true but Ris false.(d) A is false but R is true.
- Fill in the following blanks with suitable words:(a) Having two eyes gives a ................field of view.(b) Having two eyes enables us to judge.................more accurately.
- A blue colour flower plant denoted by BB is crossbred with a white colour flower plant denoted by bb.(a) State the colour of flower you expect in their F1 generation plants.(b) What must be the percentage of white flower plants in F2 generation if flowers of F1 plants are self- pollinated?(c) State the expected ratio of the genotypes BB and Bb in the F2 progeny.
- Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively.(a) Which of these persons can donate eyes?(b) Which of these persons cannot donate eyes?
- Which of these belong to the same period?ElementABCAtomic number2105A, BB, CC, AA, B & C
- Which of the following have a wider field of view?(a) Animals having two eyes on the opposite sides of their head.(b) Animals having two eyes at the front of their head.
- Having two eyes gives a person:(a) deeper field of view (b) coloured field of view(c) rear field of view (d) wider field of view
- The olfactory receptors in humans are located in:(a) eyes (b) tongue (c) ears (d) nose
- Name two animals having eyes:(a) on the sides of the head.(b) at the front of the head.
- The animals of prey have:(a) two eyes at the front (b) two eyes at the back(c) two eyes on the sides (d) one eye at the front and one on the side
- Which of the following are thermosetting polymers?(A) Melamine (B) Terylene (C) Polythene (D) BakeliteA and BB and CA and DB and D
- The skull covers and protects the(a) Eyes(b) Nose(c) Liver(d) Brain
- What are the advantages of having two eyes instead of just one?
- Which of the following plastic objects can be recycled?(A) Electric socket (B) Polythene bag(C) PVC pipe (D) AshtrayA and BB and CA and DC and D
Kickstart Your Career
Get certified by completing the course
Get Started
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies