In pea plants, green pods (G) are dominant to yellow pods (g) and tall plants (T) are dominant to short plants (t). A scientist crosses a GgTt pea plant with a ggtt pea plant and the following offspring are produced: Phenotype Number of Offspring Green, tall 723 Yellow, short 749 Green, short 48 Yellow, tall 46 What is the percent recombination frequency for this cross

Explanation:

Given

Green pods (G) are dominant over yellow pods(g);

Tall plants (T) are dominant on short plant (t)

Parents are  GgTt ( Green tall)  and ggtt (yellow short), so their cross is;

Progeny;

Green tall 723.

Yellow short  749,

Green short 48,

Yellow tall 46

Green tall and yellow short are parental type, so they are non-recombinants;

so, 723 + 749= 1566 are non-recombinants;

Green short and yellow tall are recombinants ,

so  48+ 46=94  are recombinants;

Recombination frequency (RF)= Total no. of recombinants  progeny / total progeny ×100

Total progeny= 1566;

Total recombinants= 94

RF=  94÷1566×100

= 6.0025%

protein synthesis is an example of feedback mechanism which in homeostasis

each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.