Question

near sightedness is a recessive trait. If both parents are near sighted how many of their 4 children will be also

Answer 1

All of them, do you understand why?

Answer 2

No i guess not I thought only two of them would

Answer 3

This example helps when making a pundent square. If both of the parents have the resessive trait, lets say rr, since their is no dominet trait availiable to pass off to their childeren to stop them from having near-sightedness, the only obtion is for them to aquire both ressesive triats.

Answer 4

Ok Makes sense. got time for a few more.

Answer 5

Sure, I'll try to help as much as I can.

Answer 6

Parents heterozygous for a recessive allele are called what? Heres my options: codominant, carriers, hybrids, true breeding, pleiotropic

Answer 7

I think it might be carrier

Answer 8

ok thanks

Answer 9

your welcome

Answer 10

CaitlinN.'s got all the right answers.

Answer 11

About your first question....

If mom has the genotype (r r),
and dad has the genotype (r r),

then all of the children will also be (r r).

They get an ( r ) from mom,
and another ( r ) from dad.

Get it?
They would all be near-sighted.

Answer 12

@InYourHead Good job explaining it :)