This is a karyotype from a normal male or female or a downs male or female.
Normal female
Male with Down syndrome
Normal male
Female with Down syndrome
The Correct Answer is D
- Normal female (46,XX): Would show 23 pairs of chromosomes without any extra copies. This karyotype has an extra chromosome 21.
- Male with Down syndrome (47,XY,+21): Would show one X and one Y chromosome in the 23rd pair, not two X chromosomes.
- Normal male (46,XY): Would show 23 pairs with no trisomy, and the sex chromosomes would be XY.
- Female with Down syndrome (47,XX,+21): In this karyotype, chromosome 21 appears as a triplet (Trisomy 21), which is diagnostic of Down syndrome. The 23rd pair shows two X chromosomes, confirming the individual is female. Therefore, the correct interpretation is a female with Down syndrome.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Cardiac Muscle Tissue: This tissue is found exclusively in the walls of the heart to facilitate involuntary rhythmic contractions. It is not found in the limbs.
B. Skeletal Muscle Tissue: This tissue is attached to bones and is responsible for voluntary movement. The arrow points to the quadriceps femoris group, which is composed of skeletal muscle fibers.
C. Fibrocartilage: While present in the knee (as the menisci), fibrocartilage is a tough, shock-absorbing tissue found between bones, not in the large, reddish contractile mass indicated by the arrow.
D. Dense Regular Connective Tissue: This tissue forms tendons and ligaments. While a tendon (the patellar tendon/ligament) is visible just below the arrow, the arrow specifically points to the belly of the muscle.
Correct Answer is B
Explanation
A. Epidermis: The outermost layer, thin and avascular.
B. Hypodermis: The deepest layer, composed mainly of adipose tissue, lying beneath the dermis.
C. Stratum basale: A sublayer of the epidermis, not a full skin layer.
D. Dermis: The dermis lies beneath the epidermis and above the hypodermis. It is composed of connective tissue and contains blood vessels, lymphatic vessels, nerves, sweat glands, sebaceous glands, and hair follicles.
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