Answer:
The question lacks options, the options are:
A). the body cell has 2n; the sex cell has 1n.
B). the body cell has 26; the sex cell has two.
C). the body cell has 1n; the sex cell has 2n.
D). the body cell has 24; the sex cell has 26
The answer is A
Explanation:
According to the question, the snapping turtle possesses 52 chromosomes in its cell. This means that the chromosomal number of its body cell is 52. However, the turtle, which reproduces sexually will produce gametes or sex cells via meiosis. Meiosis is the kind of cell division that results in daughter cells (gametes) that have a reduced number of chromosomes (by half).
Based on this, the diploid cells (2n) of the turtle with chromosome number 52 will undergo meiotic division to produce haploid gametes or sex cells (n) with chromosome number 26.
N.B: Diploid (2n) means two complete sets of chromosomes while haploid (1n) means one complete set of chromosome.
The body cell of the turtle contains two set of chromosomes received from each parent, hence, making it Diploid (2n). However, meiosis will reduce the chromosome number to one set in each gamete i.e. haploid (n).
Answer:
<em> a) There is a 25% chance that their next child will be Rh-.</em>
<em>b) There is a 3/8 chance for a Rh+ girl</em>
Explanation:
As we know from the question that Rh is a dominant gene. A person having only one allele for the gene will show its effect as it is the dominant character.
This means that for a person to lack the Rh factor, it shall not have any allele with the Rh factor.
To illustrate the result, lets draw a punnet square:
Rh+ Rh-
Rh+ Rh+/Rh+ Rh+/Rh-
Rh- Rh+/Rh- Rh-/Rh-
For the probability for it to be a girl, we know that there are 50-50 chances for the next baby to be a boy or a girl. The chance of being Rh+ are 75% for the next baby.
Hence,
3/4 multiplied by 1/2 is 3/8 ,which is the chance for the next baby to be a girl with Rh+ factor.
Mutualism represents a symbiotic relationship where both species involved benefit from the relationship, while on the other hand, commensalism represents a symbiotic relationship where only one organism benefit while the other does not benefit from the relationship.
Answer:
Both produce two daughter cells from each parent cell. However, Meiosis I begins with one diploid parent cell and ends with two haploid daughter cells, halving the number of chromosomes in each cell.
Explanation:
Pedigree by definition is a historical or genetic record of a family line.
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Given its genetic background, a pedigree can simply be used to trace back the inheritance of any genetic disorders and identify the source of the any specific trait.
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