Answer:
a. 81/256
b. 175/256
C. 1/4
D. 9/256
E. 54/256
Explanation:
Since both parents are heterozygous for galactosemia (Gg). The possibility of their children will be
GG Gg Gg gg. The probability for one child to be unaffected is 3/4 and affected is 1/4 since it is a recessive diseases:
A. Probability for none of the four children to be affected is 3/4*3/4*3/4*3/4=81/256
B.
Since the probability of unaffected children is 81/256
The probability that at least one child will be affected is 1-(3/4*3/4*3/4*3/4)=1-(81/256)
= 175/256
C. The probability that only one if the child will be affected is 1/4
D. The probability that the first two will have galactosemia and the second two will not is
1/4*1/4*3/4*3/4=9/256
E. The probability that two will have galactosemia and two will not, regardless of order.
Since the probability that two will have galactosemia and two will not is 9/256.
The total possible outcome that 2 among 4 children will be born regardless of order (first and second, first and third, first and fifth, second and third, second and fourth, third and fourth) is 6
Hence the probability two will have galactosemia and two will not, regardless of order is 9/256*6= 54/256
B) The cerebellum
C) The cerebrum
D) The basal ganglia
Answer:
D) The basal ganglia
Explanation:
Basal ganglia is located at the base of forebrain and the top of midbrain. It is involved in many functions because it is connected to many parts of the brain like thalamus and cerebral cortex. One of the functions of basal ganglia is to control the voluntary movements of the skeletal muscles.
Damage to basal ganglia can disturb the muscles causing involuntary movements, abnormal gait and increased muscle tone. For example, muscle tone is the tension in skeletal muscles caused due to minor involuntary contractions. Substantia nigra part of basal ganglia is responsible for controlling it. If it is damaged, muscle tone can increase which will cause unnecessary tension in skeletal muscles leading to uncontrolled movements.
a crystal is any solid that has an organized structure. ... minerals are inorganic, naturally occuring substances that have crystalline structures. so it is a prerequisite to be a crystal in order to be a mineral. all minerals, therefore, form crystals.
Answer:
Explanation:
A)The dark coloured feathers reflect heat from the sun
B)Their webbed feet make them powerful swimmers
C)They have overlapping feathers to waterproof them
D)They have thick skin and lots of fat to keep them warm
Answer:
B their webbed feet make them powerful swimmers
Answer:
See the answer below
Explanation:
Watson and Crick modeled the structure of the DNA as being made up of 2 strands with each strand composed of a long chain of nucleotide bases. The DNA. The 2 strands are said to be associated by a hydrogen bond and are twisted around each other in a ladder-like manner to form a helix structure.
Specifically on the bases, Watson and Crick modeled that the nucleotide bases component of one strand of a double helix DNA are complementary to the nucleotide bases of the other strand according to the base-pairing rule.
The base-pairing rule states that adenine always pairs with thymine while guanine always pairs with cytosine. This thus means that with the nucleotide sequence of one strand known, the sequence of the other strand of a double helix DNA can be determined.
Answer:
strength
Explanation:
Skeletal system of the human body has 206 bones. Human skeleton is divided into appendicular skeleton and axial skeleton.
The skeletal system provide support to the other parts of body, chemicals like calcium are stored in the skeletal system and red bone marrow is the site of hematopoiesis. The skeletal system doesnot provide strength because muscles are mainly involved in providing strength to the body.
Thus, the correct answer is option (3).
Answer:
d. Pluripotency markers
Explanation:
Pluripotency can be defined as the capacity of individual cells to differentiate into any cell type. Pluripotent transcription factors are pluripotent proteins that promote the differentiation of embryonic stem cells (ESCs) into stem/progenitor cells by inducing the expression of target genes, which are also capable of maintaining their pluripotent state. For example, SOX2, OCT4 and NANOG are pluripotent transcription factors highly expressed in ESCs in order to maintain the pluripotent state of these cells.