In horses, the allele for long legs (L) is dominant over the allele for short legs (1). What is the probability of short legs in the offspring of parents that are both heterozygous for the trait?

or 25%

Explanation:

Draw a punnet square:

       L           1

L     LL         L1

1      L1          11

11 is the allele for short legs so 1 in 4 of the outcomes will lead to an offspring with short legs

a. autosomal.

explanation:

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.