Question

In a monohybrid cross, if the gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, what would be the predicted result of crossing two intermediate (Tt) parent plants? (Hint: You may want to complete a Punnett square.)

25 percent tall, 50 percent intermediate, 25 percent short
50 percent tall, 25 percent intermediate, 25 percent short
100 percent intermediate
25 percent tall, 75 percent intermediate

Answer 1

There is no need to do a punnett square unless you want to visualize it. Since you're doing a heterozygous monohybrid cross, the genotypic ratio is always 1:2:1 and the phenotypic ratio is always 3:1.

However, it is given that the heterozygous pair yields a different phenotype, suggesting that there is incomplete/codominance. So by 1:2:1 of a phenotypic ratio, it is A.

Answer 2

Thank you! Can you help me with some more?

Answer 3

Sure.

Answer 4

Should I make a different post or add it to this?

Answer 5

Whatever you wish

Answer 6

Ok imma add it to this

Answer 7

This pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. Based on the information in the chart, which of the following statements is true about individuals 3 and 4?

Answer 8

A - This is partially correct. If only 1 was heterozygous, then the female wouldn't have been impacted.
B- No because if they were both homozygous recessive then they would have the trait in observance.
C - This is correct. This is the only way the daughter would be impacted.
D- No, otherwise it would've shaded it in.

Answer 9

I assume you take FLVS, based on the formatting?

Answer 10

:D yah

Answer 11

Do you think you have time for a few more?? If not its fine

Answer 12

Sure

Answer 13

What are the genotypes of the parents in the monohybrid cross below if the following offspring genotypes are predicted?

Tt and Tt
TT and tt
Tt and TT
Tt and tt

Answer 14

I don't know how to explain this - it's pretty straightforward. It should be a cross between a homozygous dominant and a heterozygous. Option C

Answer 15

Ok...thanks 2 more questions

Answer 16

k

Answer 17

Which of the following genotypes is homozygous recessive?

ss
Bb
TT
XY

Answer 18

Recessive - denoted with lower case abbreviation of the allele
Homozygous - 2 copies

So it's A

Answer 19

Thanks 1 more question
The allele for a widow’s peak has complete dominance over the allele for a straight hairline (w). What is the probability of two parents heterozygous for a widow’s peak (Ww) having an offspring with a widow’s peak?

75 percent
50 percent
0 percent
25 percent

Answer 20

It's not 50%...I know that

Answer 21

So it's a heterozygous monohybrid cross. The set genotypic ratio is always 1:2:1 and the phenotypic is 3:1. It's clearly A.

Answer 22

THANK YOU! I gotta go..imma close this post

Answer 23

Have a great rest of the day!

Answer 24

You too