Kiss of Fire $13.95 Tuna,Tomato,Avocado,Masago,Green Onion

Kiss of Fire .95 Tuna,Tomato,Avocado,Masago,Green Onion

MoolGogi Great Sushi & Cal Asian Open Hours Monday ~ Thursday 11:30am~10:00pm Friday 11:30am~11:00pm Saturday 3:00pm~11:00pm Su…
Video Rating: 0 / 5

Question by 2012: Genetics question about tomatoes please help!?
In tomatoes, purple stem (T) is controlled by a dominant gene in contrast to the recessive allele that produces a green stem (t). In addition, “cut” leaf shape is controlled by a dominant gene (R) with the recessive allele producing “potato” leaf (r). Below, you are give the data from several crosses of tomatoes. Work backwards from the data to determine the most likely genotypes of the parents

a) Purple cut X green cut = 322 purple cut, 101 purple potato, 310 green cut, 107 green potato
b) purple cut X green cut = 722 purple cut, 231 purple potato, 0 green cut, 0 green potato
c) purple cut X green potato = 404 purple cut, 0 purple potato, 387 green cut, 0 green potato
d) purple potato X green cut = 70 purple cut, 91 purple potato, 86 green cut, 77 green potato

thank you for any help you give me

Best answer:

Answer by Lena
a) Your offspring includes tomatoes with recessive characters (green cut, purple potato and green potato). That means that the parent with the dominant characters (purple cut) can’t have only the dominant alleles (TTRR).. So it has to be TtRr. About the green cut parent: It’s genotype would be either ttRR or ttRr. To check which one is correct we look at the offspring again. If it’s ttRR there would be no “potato” plants, so it has to have the recessive allele “r”. So, the green cut plant is ttRr.

b) You have no green stems at your offspring, although one of the parents has (the green cut, thus it’s tt). So, the purple cut parent should be homozygous to the dominant (TT). About the leaves: There is offspring with the “potato” character, so both parents should have the recessive allele. They express, though, the dominant phenotype, so they are heterozygous (Rr). Summarizing, the purple cut parent is TTRr and the green cut ttRr.

c) We know that the green potato parent is ttrr, because it expresses the recessive characters. About the purple cut parent: The offspring shows that there are plants with green stems (tt), so this parent can’t be homozygous to the dominant, because that way all offspring would have purple stems. You can conclude he is Tt. On the other hand, we have no plants with “potato” leaves in the offspring, so the purple cut parent should have only the dominant alleles (RR). Summarizing, the purple cut parent is TtRR.

d) The purple potato parent would be either Ttrr or TTrr and the green cut parent would be either ttRr or ttRR. But, you have all types of offspring, so the parents can’t be homozygous to their dominant characters. So they will be Ttrr and ttRr.

In these exercises, you may also want to do the crossings, so you can check if you were right. The ratios will approximately match, too.

What do you think? Answer below!

WAWO Samsung Galaxy Tab PRO 10.1 inch Tablet Smart Cover Folio Case – Green
Carefully crafted for samsung galaxy tab pro 10.1 inch tablet,protect your valuable tablet in the years ahead.——————–…
Fried Green Tomatoes (Widescreen Special Edition) [VHS]
Fried Green Tomatoes is a 1991 comedy-drama film based on the novel Fried Green Tomatoes at the Whistle Stop Cafe by Fannie Flagg….
Slim Snack: Fits in Lunchboxes Where Bulky Lunch Containers Don’t. SNACK BAG & POPSICLE ALL IN ONE! Bring Snacks to Work, School, Gym & Make Blender Pops! (Pack of 4)
A snack bag for your lunch box or gym bag, the Slim Snack has many uses. Carry home made trail mixes and turn smoothies into heal…
CO2 Generating Green Pad – 5 Pack
The Green Pad 5 Pack
Small tent r…

Related Green Tomato Articles