$A$ cross between a tall plant $(TT)$ and a short pea plant $(tt)$ resulted in progeny that were all tall plants because

$A$ child who inherits an $X-$chromosome from her father will be a boy.

How can the chromosomes be identified?

The human species $(Homo\,sapiens)$ have genetic roots in $......$

In human males and females, how many pairs of chromosomes are identical (in $pairs$)?

Two pea plants,one with round green seeds $(RRyy)$ and another with wrinkled yellow $(rrYY)$ seeds,produce $F_1$ progeny that have round,yellow $(RrYy)$ seeds. When $F_1$ plants are selfed,the $F_2$ progeny will have new combinations of characters. Choose the new combinations from the following:
$(i)$ Round,yellow
$(ii)$ Round,green
$(iii)$ Wrinkled,yellow
$(iv)$ Wrinkled,green