All questions of Applied Genetics for Grade 9 Exam
What is the difference between the sex chromosomes in females and males?- a) They are identical in females and differ in males
- b) They are different in females and males
- c) They are absent in females and present in males
- d) They are identical in both females and males
Correct answer is option 'A'. Can you explain this answer?
What is the difference between the sex chromosomes in females and males?
a)
They are identical in females and differ in males
b)
They are different in females and males
c)
They are absent in females and present in males
d)
They are identical in both females and males
|
Pranab Goyal answered |
Sex Chromosomes in Females and Males
Sex chromosomes determine an individual's biological sex. In humans, females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY).
Difference between Sex Chromosomes in Females and Males
- Identical in Females and Differ in Males: The main difference between the sex chromosomes in females and males is that they are identical in females (XX), while they differ in males (XY). This difference in sex chromosomes leads to the development of primary and secondary sexual characteristics in each sex.
- Role of Sex Chromosomes: The presence of the Y chromosome in males determines the development of male reproductive organs and secondary sexual characteristics, such as facial hair and a deeper voice. On the other hand, females develop with two X chromosomes, leading to the development of female reproductive organs and secondary sexual characteristics, such as breast development.
- Genetic Inheritance: The sex chromosomes are inherited from parents during conception. The father contributes either an X or a Y chromosome, while the mother always contributes an X chromosome. The combination of sex chromosomes determines the biological sex of the offspring.
- Genetic Disorders: Variations in sex chromosome composition can lead to genetic disorders, such as Turner syndrome (XO), Klinefelter syndrome (XXY), and Triple X syndrome (XXX).
In conclusion, the sex chromosomes in females are identical (XX), while they differ in males (XY), playing a crucial role in determining an individual's biological sex and influencing various aspects of development and genetic inheritance.
Sex chromosomes determine an individual's biological sex. In humans, females typically have two X chromosomes (XX), while males have one X and one Y chromosome (XY).
Difference between Sex Chromosomes in Females and Males
- Identical in Females and Differ in Males: The main difference between the sex chromosomes in females and males is that they are identical in females (XX), while they differ in males (XY). This difference in sex chromosomes leads to the development of primary and secondary sexual characteristics in each sex.
- Role of Sex Chromosomes: The presence of the Y chromosome in males determines the development of male reproductive organs and secondary sexual characteristics, such as facial hair and a deeper voice. On the other hand, females develop with two X chromosomes, leading to the development of female reproductive organs and secondary sexual characteristics, such as breast development.
- Genetic Inheritance: The sex chromosomes are inherited from parents during conception. The father contributes either an X or a Y chromosome, while the mother always contributes an X chromosome. The combination of sex chromosomes determines the biological sex of the offspring.
- Genetic Disorders: Variations in sex chromosome composition can lead to genetic disorders, such as Turner syndrome (XO), Klinefelter syndrome (XXY), and Triple X syndrome (XXX).
In conclusion, the sex chromosomes in females are identical (XX), while they differ in males (XY), playing a crucial role in determining an individual's biological sex and influencing various aspects of development and genetic inheritance.
In genetics, what are genes existing in pairs of similar forms called?- a) Homologues
- b) Pairs
- c) Alleles
- d) Chromosomes
Correct answer is option 'C'. Can you explain this answer?
In genetics, what are genes existing in pairs of similar forms called?
a)
Homologues
b)
Pairs
c)
Alleles
d)
Chromosomes
|
Ssc Cgl answered |
Genes existing in pairs of similar forms are called alleles. Alleles are different versions of the same gene that can result in different traits or characteristics in an organism. Understanding alleles is key to comprehending how genetic traits are inherited and expressed.
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