PATHOLOGY

PATHOLOGY MCQ

GENETICS AND DISEASE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
An egg contains
A
22 autosomes and an X chromosome
B
22 autosomes and an Y chromosome
C
44 autosomes and 2 X chromosomes
D
44 autosomes and an X and a Y chromosome
Explanation: 

Detailed explanation-1: -Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size.

Detailed explanation-2: -Each sperm cell contains 23 chromosomes : 22 autosomes and one sex chromosome (X or Y).

Detailed explanation-3: -Human sperm (and eggs) are in the haploid state, meaning that only have one copy of each chromosome, or 22 autosomes and one sex chromosome (either X or Y).

Detailed explanation-4: -Egg cells are haploid gametes of females, which means they have one-half set of chromosomes. Thus, they have 22 autosomes and an X-chromosome for a total of 23 chromosomes total, half of the 46 chromosomes in a complete somatic cell.

Detailed explanation-5: -Diploid. A diploid cell has two complete sets of chromosomes. Most cells in humans are diploid, comprising 23 chromosome pairs, so 46 chromosomes in total. This is 22 pairs of autosomes and a pair of sex chromosomes.

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