contestada

In star trek, mr spock is half vulcan and half human. spock has green blood like his father and not red blood like his mother. is spock married another half human/half vulcan, then what percentage of the offspring would have red blood

Respuesta :

SparkyAngelDragon
Easy! make a punnet square, like this....
B- dominant (green blood)
b- recessive (red blood)

          B                   b
       ______________
B    |               |               |
       |               |               |
       |_______|______|
       |                |              |
  B  |                 |              |
       |________|______|
(sorry for poor spacing XD)
The first 2 statistics would be BB and Bb, Pure dominant and hybrid
The second 2 would also be BB and Bb, dominant and hybrid.
Their is a 100% chance of green-blooded children, and a 50% chance of pure greenblooded children and 50% chance of "hybrid" greenblooded children.
marianaegarciaperedo

Assuming that blood color is determied by a single diallelic gene expressing complete dominance, and that Spock and his wife are heter0zyg0us for the trait, 25% of the offspring is expected to have red blood.

-------------------

Available data:

  • mr spock is half vulcan and half human
  • spock has green blood
  • spock's father has green blood
  • spock's mother has red blood
  • spock married another half human/half vulcan

Let us assume that blood color is determined by a single diallelic gene that expresses complete dominance.

Spock's father has green blood, and his mother has red blood. Spock being green-blooded suggests that green is the dominant trait and he inherited from his father.

We can name this gene, B (blood color)

  • B is the dominant allele and codes for green blood color
  • b is the recessive allele and codes for red blood color

So Spock received at least one dominant allele from his father and one recessive allele from his mother. He is heter0zyg0us for the trait Bb.

Spock married a half-human/half Vulcan woman. We can assume that she is also heter0zyg0us for blood color trait.

So, their cross would be as follows

Cross: Mr Spock with a half human/half vulcan woman

Parentals)    Bb     x    Bb

Gametes)  B     b      B      b

Punnett Square)     B          b

                      B      BB       Bb

                      b      Bb        bb

F1) Genotype

  • 1/4 = 25% of the progeny is expected to be h0m0zyg0us dominant, BB
  • 2/4 = 50% of the progeny is expected to be heter0zyg0us, Bb
  • 1/4 = 25% of the progeny is expected to be h0m0zyg0us recessive, bb

Genotypic ratio 1:2:1

    Phenotype

  • 3/4 = 75% of the progeny is expected to be gree-blooded, BB + Bb
  • 1/4 = 25% of the progeny is expected to be red-blooded, bb

Phenotypic ratio 3:1

⇒⇒ what percentage of the offspring would have red blood?

25% of the offspring is expected to have red blood.

---------------------------------------

Related link: https://brainly.com/question/11348303?referrer=searchResults

                     https://brainly.com/question/5689067?referrer=searchResults

Otras preguntas