HOSA HUMAN GROWTH AND DEVELOPMENT 2026 ACTUAL EXAM ALL 190 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

HOSA HUMAN GROWTH AND DEVELOPMENT 2026 ACTUAL EXAM ALL 190 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

HOSA HUMAN GROWTH AND DEVELOPMENT 2026 ACTUAL

EXAM ALL 190 QUESTIONS AND CORRECT DETAILED

ANSWERS WITH RATIONALES (VERIFIED ANSWERS)

|ALREADY GRADED A+

What happens when genes mutate? - ANSWER- They normally become

the basis for some form of disease.

What are single-gene diseases? - ANSWER- This results from an

individual mutant gene and may cause a failure to create something

necessary.

What are some examples of single-gene diseases? - ANSWER- Cystic

Fibrosis, Hemophilia, Albinism, Huntingtons disease

What are chromosomal diseases? What are the categories? - ANSWERThis disease is a result of chromosomal breakage, abnormal

chromosome, or a missing chromosome. They two categories are

trisomy and monosomy.

What are examples of nonfatal chromosomal diseases? - ANSWERDown syndrome and Turner syndrome

What is gene therapy? - ANSWER- The treatment of single-cell disease

by replacing the mutant gene.

What are genetic engineering and recombinant DNA? - ANSWERRecombinant DNA is the imitation and artificial manipulation of DNA.

With recombinant DNA, scientist hope to replace defective genes with

copies of healthy genes.

How long does prenatal development last? - ANSWER- 38 weeks from

conception to birth

What happens during the zygote period? - ANSWER- The is during the

first 2 weeks of pregnancy and is when the zygote travels from the

Fallopian tube to the uterus and implants itself in the uterine wall, here is

where the amnion forms. Near the end of the 2 weeks the placenta is

developed.

What happens during the embryonic period? - ANSWER- This period is

from the 2nd weeks to the 8th week. Three layers of cells develop (1.

Ectoderm Layer: Skin and nervous system, 2. Mesoderm: Muscle,

skeleton, cardiovascular system, and other organs, 3. Endoderm:

Digestive system, lungs, urinary tract, and glands.). Heart begins to

pump blood. During the second half of this period facial features, arms,

legs, fingers, and toes begin to form.

What happens during the fetal period? - ANSWER- This is during the

9th week to birth. During this period, organs, muscles, and the nervous

system begins to organize. Lungs begin to expand and contract to

simulate breathing. External genitals are distinguishable. Fingernails,

toenails, and eyelids form. After 18 weeks babies movement can be felt

by the mother. After 20 weeks baby can hear and react to sound. After

24 weeks brain neurons are developed. After 25-38 weeks the cerebral

cortex continues to develop and fetus gains a layer of fat, ultimately

adding 5 pounds to the babies weight. The fetus receives antibodies from

the mothers blood to protect it from illness until its own immune system

forms.

What is the age of viability? - ANSWER- When a fetus has a chance to

live outside the womb and survive. Normally from 25-38 weeks.

What are teratogens? What are some examples? - ANSWEREnvironmental substances that may cause damage during prenatal

development. Examples: medications, drugs, alcohol, and pollution

Why should a mother consult a doctor after taking any medication? -

ANSWER- Some medications can cause low birth weight, low

intelligence, and death.

What is Fetal alcohol syndrome? - ANSWER- This is a serious effect

due to a mother consuming alcohol during pregnancy. This can cause

mental retardation, poor attention, and hyperactivity.

What are some non-teratogenic health concerns? - ANSWER- Nutrition,

anxiety, miscarriage, chromosomal defects, medical care, mothers age,

good incompatibility

What is considered the neonatal period? - ANSWER- The first 4 weeks

of life