(a) If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human (i) sperm cell, and (ii) zygote?(b) What sizes of plants are produced if both parents have genes Tt?
(a) When a normal human cell has 46 chromosomes, the number of chromosomes present in
(i) sperm cell will be half the number of total chromosomes, that is it contains 23 chromosomes.
(ii) zygote cell is 2n that is it contains a similar number of chromosomes is present in a normal human cell, that is 46 chromosomes.
(b) When both the parents contains genes Tt, then the ratio of the height present in offsprings will be tall: short = 3: 1. Thus, 75% of the plants will be of tall height and 25% of the plants will be short in height.
Related Articles
- In a human, how many chromosomes are present in:(a) a brain cell? (b) a sperm in the testes? (c) an egg which has just been produced by the ovary? (d) a skin cell? (e) a fertilised egg?
- The ratio of number of chromosomes in a human zygote and a human sperm is:(a) 2:1 (b) 3:1 (c) 1:2 (d) 1:3
- The normal body cell of an organism contains 28 pairs of chromosomes. The number of chromosomes present in its germ cell will be:(a) 28 (b) 14 (c) 56 (d) 42
- Choose the correct statement:(a) Genes are located in the chromosomes(b) The cell is located in the nucleus(c) Chromosomes are located in the nucleolus(d) Cell membrane surrounds the nucleus
- The palisade cells of a species of plant contain 28 chromosomes. How many chromosomes will there be in each gamete produced by the plant?(a) 56 (b) 28 (c) 14 (d) 4
- Where are chromosomes found in a cell? State their function.
- In tobacco plant, the male gametes have 24 chromosomes.(i) What is the number of chromosomes in the female gamete? (ii) What is the number of chromosomes in the zygote?
- The number of chromosomes in parents and offsprings of a particular species remains constant due to:doubling of chromosomes after zygote formation.halving of chromosomes during gamete formation.doubling of chromosomes after gamete formation.halving of chromosomes after gamete formation.
- How many bones are there in a human baby?
- The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.(a) What are chromosomes (i) B (ii) D, and (iii) E? (b) Out of B, D and E, which two chromosomes are of the same type? (c) Which chromosome is smaller in size? (d) What is the general name of chromosomes such as B and E? (e) Out of the two persons A and C, which one is (i) male, and (ii) female?
- In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are:(i) large chromosome (ii) small chromosome (iii) Y chromosome (iv) X chromosome(a) (i) and (ii) (b) (iii) only (c) (iii) and (iv) (d) (ii) and (iv)
- What is the:(a) far point of a normal human eye?(b) near point of a normal human eye?
- In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote?
- The human animal which has an XY pair of chromosomes is called:(a) male (b) hybrid (c) female (d) doomed
- What Are Chromosomes?
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