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The genetic constitution of a child getting an X bearing sperm from the father will be:
46+XX
46+XY
44+XX
44+XY
44+XX
Human somatic cells contain 46 chromosomes in total, arranged as 22 pairs of autosomes (44) and 1 pair of sex chromosomes (2). A sperm carrying an X chromosome fuses with an egg (which always carries an X chromosome), resulting in a zygote with 44 autosomes and two X sex chromosomes (44+XX), determining female sex.
Human somatic cells contain 46 chromosomes in total, arranged as 22 pairs of autosomes (44) and 1 pair of sex chromosomes (2). A sperm carrying an X chromosome fuses with an egg (which always carries an X chromosome), resulting in a zygote with 44 autosomes and two X sex chromosomes (44+XX), determining female sex.
Think of autosomes as 44 identical textbook pages that both parents contribute equally, while the father flips a coin for the final pair: getting an 'X' coin matches the mother's 'X' coin to complete an XX pair.
X from Dad makes XX (Female); Y from Dad makes XY (Male).
Female┬аZygote=(22+X)eggтАЛ+(22+X)spermтАЛ=44+XX
Male┬аZygote=(22+X)eggтАЛ+(22+Y)spermтАЛ=44+XY
Sex determination in humans follows the XXтИТXY mechanism. Males produce two types of heterogametic sperm (22+X or 22+Y), while females produce homogametic eggs (22+X). Fertilization of a 22+X egg by a 22+X sperm results in (22+22)+(X+X)=44+XX, leading to a female offspring.
Human cells have 23 pairs (46 total) of chromosomes: 44 autosomes and 2 sex chromosomes.
The father determines the biological sex of the child because sperm can carry either an X or a Y chromosome.
Understanding genetic inheritance and sex determination in humans.
Karyotyping for detecting chromosomal abnormalities like Turner syndrome (44+XO) or Klinefelter syndrome (44+XXY).
Option A (46+XX) and Option B (46+XY) incorrectly add 46 autosomes to 2 sex chromosomes, which would total 48 chromosomes.
Option D (44+XY) represents the genetic constitution of a male child, which occurs when a Y-bearing sperm fertilizes the egg.
C is correct тАФ An X-bearing sperm (22+X) fusing with an egg (22+X) results in a genetic constitution of 44 autosomes and two X sex chromosomes (44+XX).
Always pay attention to notation: '44+XX' explicitly separates autosomes (44) from sex chromosomes (2) to give a total of 46 chromosomes. Do not confuse total chromosome count with autosome count!
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