The fluid that runs through the circulatory system

A woman has her personal genome analyzed for the BRCA1 mutation after learning that her father is heterozygous and carries one m

puteri [66]

Answer:

a. 50%

Explanation:

BRCA1 genes is a tumor supressor gene whose harmful mutation can cause hereditary breast ovarian cancer syndrome in both males and females. The BRCA actually stands for breast cancer.

Mutation in BRCA1 gene is heritable and every progeny of a carrier parent irrespective of the sex has a 50% chance of inheriting the trait from such parent, be it from the mother or the father.

Hence, the correct option is a.

5 0

2 years ago

If a heterozygous individual of genotype Bb is testcrossed to a recessive parent (bb), what will the phenotypic ratio of the pro

djverab [1.8K]

Bb × bb = 2 Bb : 2 bb = 1 Bb : 1 bb

Thus, the phenotypic ratio would be 1 Dominant Phenotype : 1 Recessive Phenotype.

3 0

2 years ago

Which is the order of airflow during inhalation?

tigry1 [53]

Answer:

Nasal cavity, larynx, trachea, bronchi, bronchioles, alveoli.

Explanation:

The air travels through the respiratory system during inhalation in the next order:

Nasal cavity: You inhale air into your nose.
Larynx: The air travels down to this organ, a hollow, tubular structure that plays a key role in phonation, respiration, and deglutition.
Trachea: (Or windpipe) is a wide, hollow and cartilaginous tube that connects the larynx to the bronchi.
Bronchi: The trachea divides into two primary bronchi; they are the main passageway into the lungs.
Bronchioles: The bronchi develop smaller the closer they get to the lung tissue and are then consider bronchioles.
Alveoli: They are tiny air sacs located at the end of the bronchioles, which is the site of oxygen and carbon dioxide exchange in the respiratory system.

8 0

2 years ago

Colostrum, which is rich in protein, micronutrients, and antibodies, is replaced by mature milk in about colostrum, which is ric

makkiz [27]

Colostrum is replaced by transitional milk in about 2 to 4 days after birth. This milk contains high levels of lactose, fat, vitamins and more calories than the colostrum. Mature milk replaces the transitional milk and begins to appear near the end of the second week after childbirth. Mature milk contains more water than transitional milk.

5 0

2 years ago

Prairie dogs are a species whose very presence contributes to the existence of the ecosystem in which it lives. Prairie dogs con

Andrew [12]

Answer:

Explanation:

Key stone species

6 0

2 years ago